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TRANSCRIPT
1
THE RISE OF EUROPE AND ATLANTIC TRADE: DID NATIONAL
INSTITUTIONS DO IT?1
Guillaume Daudin2
Draft: please do not quote
Abstract
This paper explores the idea that Atlantic trade had a role on growth in Early Modern
Europe through constitutional, nation-level institutional change à la Acemoglu, Johnson and
Robinson (2005). In a first part, it presents arguments which could explain a positive link
between Atlantic trade in Early Modern Europe and growth. It underlines that there are
difficulties associated with the constitutional argument. In a second part, it studies the
individual experience of 193 cities to show that, once externalities of cities on each other are
taken into account, the positive national effect of Atlantic trade conditional on starting
institutions exists alongside a positive local effect of Atlantic trade, unconditional on starting
institutions. In a third part, it uses a new database of regional urban population to show the
same thing based on the experience of 684 European cities. Atlantic trade had unconditional
local effects. As constitutional institutions are by definition national, it makes it unlikely that
they were the only channels of its influence on European growth.
Keywords: Early Modern Europe, Intercontinental trade, Growth, Economic Geography,
Cities
JEL Codes: F43, N13, N73, O18
1 I thank Leandro Prados de la Escosura, David Ormond, Richard Sullivan, Jacob Weisdorf, participants to the 2009 Fresh Alps, 2010 EHS conference in Durham, 2010 EBHS annual meeting in Braga (Portugal), 2010 ASSA meetings and the economic history seminar in the University Carlos III, 2014 Berlin Economic History seminar for their insightful comments and suggestions. I thank George Welling for sharing Dutch navigation data with me. I thank Leonor Freire Costa for sharing Portuguese navigation data. All errors remain mine. 2 PSL, Université Paris-Dauphine, DIAL UMR-IRD 225 F-75016 Paris, France PSL, IRD, DIAL UMR-IRD 225, F-75016 Paris, France Sciences Po, OFCE, F-75007 Paris, France
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Introduction
The European exploration voyages of the fifteenth and sixteenth century and the
colonialist policies of European states transformed Europe from a peripheral region of the
world economy in 1500 to its mercantile center in 1850. It was a spectacular and impressive
phenomenon. As the Great Divergence in economic development happened at the same time,
it seemed natural to many observers to link the two. The debate on the subject has been raging
at least since the warnings of Adam Smith on the deleterious effect of mercantilist policies on
national prosperity. Marxist historians have long defended the idea that the profits from
empire and intercontinental trade were important for capital accumulation preparing the
Industrial Revolution before the Industrial Revolution (Marx [1867 (1993)], Williams [1944
(1966)], Amin [1974], Frank [1978], Wallerstein [1980] et Crouzet [1972], p. 8). Neoclassical
economic historians mostly agree with Patrick O’Brien that empire and intercontinental trade
was simply too small to significantly affect European economies (O’Brien [1982]; see also
Sheridan [1965], Thomas & Bean [1974], Richardson [1975], Inikori [1981], Darity [1985],
Solow, Barbara L. & Engerman [1987] et Eltis & Engerman [2000]). Patrick O’Brien
famously changed his mind on the subject, and both the Great Divergence debate and new
empirical analysis have given new life the idea that empires and intercontinental trade were
central to Europe’s economic success (O’Brien et de la Escosura 1998; O’Brien 2000;
Pomeranz 2000; Allen 2003; Acemoglu, Johnson, et Robinson 2005; Findlay et O’Rourke
2007; Costa, Palma, et Reis 2015)3.
This paper empirically explores the channels that can explain this relation, and
specifically discusses whether Atlantic trade had a role on growth in Early Modern Europe
only through constitutional, nation-level institutional change à la Acemoglu, Johnson and
Robinson (2005) or also through local effects.
3 For a contrarian view, see (De Pleijt et Van Zanden 2013)
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Both national or local effects would be plausible. Many different channels through which
empire and trade had an effect of European growth have been proffered, that can be regrouped
into two groups.
The first one looks into goods and markets. Atlantic trade deepened the market
integration of Europe with the rest of the world, making new markets and new sources for raw
materials available. As underlined by (O’Rourke, Prados de la Escosura, et Daudin 2010),
comparative advantages could only have limited effects in a world where scarce resources
could be transferred from one sector to another. The structural changes linked to increased
trade could be large if some sectors were more conducive to long-term growth than others.
There are both theoretical arguments (Galor 2005; Galor et Mountford 2003) and empirical
evidence (Williamson 2011) on the importance of international trade in de-industrializing the
« South» Asia and industrializing Europe, but that is mainly a nineteenth century story. This
is also the case for the idea that intercontinental trade allowed Europe to escape the
Malthusian constraint by integrating the large land expenses of the New World into its
economy (Pomeranz 2000). In the eighteenth century, the Indian manufactured sector was
going well and Europe was not dependent on the exterior for its industrial raw materials or its
caloric intake. It is not clear the volume of trade was then large enough to have a sizeable
effect on prices and on the reallocation of productive resources in Europe (O’Rourke et
Williamson 2002; Acemoglu, Johnson, et Robinson 2005, 562) before the industrial
revolution, all the more so as a sizeable part of intercontinental trade was entrepot trade.
Buying sugar in the West Indies for its ultimate sale in Northern Europe was less
transformative than producing goods for foreign markets or consuming foreign goods.
Yet this effect could have been larger if there were many under-utilized factors of
production in the economy and if Smithian mechanisms of deepening market integration
(Jones 1998; Mokyr 1990, 5) were crucial for the development of Europe. One version of this
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idea is the notion of “industrious revolution”. The germ of this idea can be found in Smith’s
“vent for surplus” theory of international trade (Oulton 1993). It suggests that the integration
of households in the domestic market economy through proto-industry and market agriculture
was an important growth mechanism (de Vries 1994; de Vries 2008). It manifested, for
example, through the increase in the number of hours worked (Voth 2001). Slave and Atlantic
trade offered new, exotic, consumption goods which encouraged market participation of
willing consumers. Hersh and Voth have suggested that the availability of tea, sugar and
coffee at affordable prices improved English welfare by around 15% (Voth et Hersh 2009).
The fact that new markets and products encouraged industrial and agricultural production
at least locally, as demonstrated a contrario by the devastating effect of trade disruption
throughout coastal continental Europe during the Napoleonic wars (Crouzet 1964), is beyond
doubt. Whether there was a sizeable national effect, or if, for example, the prosperity of the
coastal economy was the counterpart to a lack of investments in the interior economy, as
famously argued by Smith and Young in the French case (Smith 1776, book IV, chapter VII;
Young 1794, september 21st 1788), is still in doubt.
The second group of channels through which empire and trade had an effect of Europe
focuses on the actors of international trade and their profits. Even if Atlantic trade might not
have been large enough to change the structure of European economies, it was large enough
to improve the economic and political position of specific groups, especially traders. In a
specific European tradition started by Venice, mercantilist policies ranging from direct
subsidies to military action against competitors (Curtin 1984, 116) supported their activities to
the detriment of other European. It led them to a higher rate of profits in intercontinental trade
than in domestic activities. This has been abundantly studied throughout Europe. We will use
the example of France to illustrate it. (Daudin 2004) has shown the existence of high profits in
French slave and Atlantic trade in the eighteenth century has. These high profits were not a
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remuneration for risk or illiquidity: long distance trade was still a good investment even
taking these into account, as long as diversification was possible, which was possible
conditional on wealth.
A number of anti-competition mechanisms were at work to maintain intercontinental
trade profits could be maintained at a high level for traders. First, because traders privately
benefited from mercantilist policies which burden was shared by the society as a whole.
Second, because the extension of the trade of individual countries was often done at the
expense of other countries. Finally, because European-controlled trade represented only a
small part of world trade. For example, intra-Asian trade was still a frontier for European
mercantile expansion in the late eighteenth century. French traders and capitalists during the
eighteenth century first exploited trade with the West Indies, then slave trade, and finally were
starting to expand in Asian trade at the end of the century.
As a result, investing into slave and Atlantic trade was restricted: that prevented profit
rates to decline to market levels. Trade entrepreneurs did not accept everyone’s capital. Most
passive investors were either former trade entrepreneurs, or part of the family and friends of
trade entrepreneurs. There does not seem the have been a demand for external capital. In
Nantes, ‘The study of ship shares leads us to believe that capital circulated in a close circuit’
(Meyer 1969). In Marseilles, the town used mainly its own capital to finance its trade. Most of
what seems to be external capital was actually former trading capital coming back to the
sector (Carrière 1973, 944). In La Rochelle, a relatively small port, only 20% of the capital
invested in international trade came from other places at the end of the 1780s, and much of
that came from Nantes and Bordeaux (Clark 1981, 221�24). In Bordeaux, traders ‘were keen
to deal within a circle of close friends, preferably parents, and were reluctant to deal with
speculators from different towns’ (Butel 1974). The entry ticket for would-be investors seems
to have been to become traders, or get a trader in their close circle. Solier is an example of
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how a Swiss protestant group tried to get into trade in Marseilles (Dermigny 1960, 171�81;
Carrière 1961; Carrière 1973, 939): The early career of Benoît Lacoube is another example of
a successful trading family from the interior trying unsuccessfully to get into Atlantic trade,
this time in Bordeaux (Cornette 1986).
Traders were not able to capture rents from intercontinental trade everywhere. They could
do it in England and in the Netherlands and, as we have seen, in France. They implemented
international policies partly devoted to supporting the activity of domestic traders (Mielants
2007; Arrighi 1994). It was not the case in Spain and Portugal were colonial revenues
reinforced the state and the aristocracy and allowed them to bypass negotiation with other
power groups (O’Rourke, Prados de la Escosura, et Daudin 2010). Furthermore, the Spanish
and Portuguese states were unsuccessful in checking the rising trade activity of their
competitors.
The improvement in the political position of traders had as its most direct consequence
the improvement of their own prospects of wealth accumulation. One traditional view is that
traders’ profits had an important role in early modern accumulation of capital. The strongest
form of this idea suggests this was at the root of the Industrial Revolution (Williams 1944;
Wallerstein 1989). It is now discredited. A weaker form of this idea is that slave trade and
plantation colonies played an important role in accumulation before the Industrial Revolution.
This is still debated. Many economic historians would agree with O’Brien’s view that profits
from the “periphery,” or, approximately, the non-European world, were simply too small to
have played a major role in European growth before the Industrial Revolution (O’Brien 1982;
Eltis et Engerman 2000; Daudin 2006).
Traders might have been central as economic actors, especially as the handmaiden of
deepening market integration and “industrious revolution”, domestic traders played two roles.
First, they offered new consumption goods, which diffusion can be seen in probate
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inventories (Baulant 1989; Roche 1997). Second, they had an active role in the organization
of production and in distribution, as suggested by the literature on proto-industry (Mendels
1972). As we have seen before, getting into Atlantic trade was an important, and difficult,
step in the enrichment of traders. Increased Atlantic trade profits might have encouraged them
to do even more effort to access the sector. As not every trader succeeded, this increased
effort might have lead to more domestic trading activity in the same way than the possibility
of brain drain increases education formation in developing countries and, if the “success rate”
is not too high, actually paradoxically increases the stock of human capital in some countries
(Beine, Docquier, et Rapoport 2001).
The view espoused by Acemoglu, Johnson and Robinson focuses on traders as political
actor in the political economy of the European state. Obviously, the ultimate aim of traders
was to improve their own position rather than the functioning of the state, as is recognized by
Acemoglu, Johnson and Robinson, especially in the working paper version of their article
(Acemoglu, Johnson, et Robinson 2002, 27). Traders mainly clamored for public protection
and support to their own economic activities (Hirsch 1991; Lindberg 2009; Stasavage 2016).
Still, the improved economic and political position of traders was crucial for European
development because traders were a progressive political force able to coerce national
governments into setting up institutions restricting the power of monarchy and securing
broad-based property rights. Their numerous empirical tests and convincing robustness
checks (Acemoglu, Johnson, et Robinson 2005) certainly give weight to their argument. It
gives an explanation of the emergence of improved institutions in Northwestern Europe
(North et Thomas 1973). More generally, the link between the rise of traders, merchant
capitalism and growth is a recurring theme in the historical literature (e. g. Braudel 1997)
since Voltaire remarked on the role of English traders in their polity in his tenth lettre
philosophique (Voltaire 2010).
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These are arguments about national politics. A large part of politics is local, and it might
be the case that traders also left their mark in sub-national, city level institutions. This has
been argued forcefully by Oscar Gelderbom (Gelderblom 2013). Studying the cases of
Bruges, Antwerp and Amsterdam from 1250 to 1650, he shows that urban competition
(including a large number of competing cities, footloose foreign traders and municipal
autonomy) was central to the rise of inclusive trade institutions in Europe. This is very
plausible in the case of decentralized polities like the Low Countries and Italy. Can it be
generalized?
Most of the economic, quantitative, debate on the role of Atlantic trade on European
growth focuses on the national level, presumably because that is the level at which most of
the quantitative data are available. Most of the historical, qualitative debate focuses on the
local level, where the consequences of Atlantic trade are the most visible. This paper aims at
bridging the gap by examining quantitative evidence at the local level. Countries might not be
the proper unit of analysis to think about growth, especially before the 19th century. This
paper shows that, beside national effects, trade also had local effects. Towns and regions
nearby trading cities benefited from Atlantic trade more than interior cities. Because
constitutional institutions are national, these local effects must have been transmitted through
another channel. Many explanations are obviously available, as we just discussed.
The paper is organized as follows. The following section presents the data. The next
section uses Bairoch’s database of city sizes to show that, once externalities of cities on each
other are taken into account, the positive national effect of Atlantic trade, conditional on good
starting institutions, is completed by an unconditional local positive effect. This analysis uses
a balanced panel of 193 cities. The third section, it uses a new database of regional urban
population to summarize the experience of 684 cities and show the importance of the local
effects of Atlantic trade. to show the same thing. As constitutional institutions are by
9
definition national, it makes it unlikely that they were the only channels of its influence on
European growth.
1. Data
The main proxy for development in Acemoglu, Johnson and Robinson is urbanization as
their main proxy for development, and they emphasize the link formed by institutions. Like
they do, we use (Bairoch, Batou, et Chèvre 1988). This database has been expanded and
corrected by (Maarten Bosker, Buringh, et van Zanden 2013). We have made a number of
corrections, notably for the population of Amsterdam and Antwerp (Van Roey 1975; Lourens
et Lucassen 1997, 55�57).4
Our measure of trade comes mainly from the database provided by Acemoglu, Johnson
and Robinson. This database measures Atlantic trade in terms of annual voyages by 400-ton
equivalent ships. Figure 1 gives their estimates for the five trading countries.5
4 Jan Van Roey, ‘De Bevolking’, in: Walter Couvreur (ed), Antwerpen in de XVIde deuw, (Antwerpen 1975) 95-108; Piet Lourens and Jan Lucassen, Inwonertallen van Nederlandse steden, ca. 1300-1800 (Amsterdam 1997) 55-57. 5
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Figure 1: National Atlantic trade, 1400-1850
We improve the quality of their data at the margin by taking into account Portuguese and
Dutch trade with the Western Hemisphere along with more recent estimates for French trade
(thanks to George Welling and Leonor Freire Costa and Guillaume Daudin for sharing their
data).
Figure 2: Better national Atlantic trade, 1400-1850
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2. Explaining city growth
One first way to look at that is to contrast the growth rates of cities close to Atlantic ports
in country with reasonable starting institutions in the 16th century (see Figure 3). As predicted
by Acemoglu, Johnson and Robinson, towns in countries participating to slave and Atlantic
trade and with good starting institutions grew faster than other European towns (except in the
early 18th century). But it is striking that, inside these countries, towns nearer to Atlantic ports
also grew faster by a similar order of magnitude.
Figure 3: Urban growth in Europe
More formally, Table 1 uses a panel regression to show that this difference is indeed
significant. This econometric exercise expands from Acemoglu, Johnson and Robinson and
Bosker, Buringh and Luiten van Zanden (Marteen Bosker, Buringh, et Luiten van Zanden
2008).
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Regression (1) tests AJR’s hypothesis on the 193 which population is known from 1300 to
1850. Atlantic ports in good institution countries are larger than other cities. All cities in
countries with both good institutions and Atlantic trade are larger than other cities, confirming
the hypothesis that Atlantic trade and good starting institutions, together, favour development
at the national level, maybe because of their positive effect on national institutions. On the
other hand, cities in countries which participated in Atlantic trade6 are on the whole smaller
than other cities: good institution were indeed crucial to benefit from Atlantic trade.
Regression (2) however shows that this result is weakened by the introduction of the
urban potential variable suggested by Bosker, Buringh and Luiten van Zanden. This variable
takes into account the positive externalities of cities on one another in Europe.
Urban potential of city i = Population of city jDistance between i and jj≠i
∑
Regression (3) goes further to check if Atlantic ports, in good institution settings, have
more of a positive effect around them than other cities. It introduces a “domestic Atlantic
port” specific variable. This variable is constructed like the urban potential variable, except
that only domestic Atlantic ports are taken into account. This variable has a non-significant
negative effect. Its product with starting institutions has a small, barely statistically significant
negative effect.
Atlantic port potential of city i = Population of Atlantic port kDistance between i and kk≠i
∑
Using all the information available on all cities does not change significantly the results.
The hypothesis by Acemoglu, Johnson and Robinson is indeed vindicated. Countries which
participated in Atlantic trade did not have larger cities. Countries which participated in
Atlantic trade and had good starting institutions did.
6 Only five countries are considered as having participated to Atlantic trade in the Acemoglu, Johnson and Robinson’s dataset: France, the Netherlands, Portugal, Spain and the United Kingdom. 1988 borders are used throughout.
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Table 1: Explaining city size, 1300-1850 (BBZ&AJR population data, new trade data)
Balanced panel
Balanced panel
Balanced panel
Summary statistics
Unbalanced panel
Summary statistics
City and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(1) AJR main hypothesis for cities
(2) AJR main hypothesis
+ BBZ
(3) AJR + BBZ
+ This paper
(4)
Explained variable: ln(city population)
3.29 2.53 (0.87) (0.74)
Log(European volume of Atlantic trade) x being part of a country participating to
Atlantic trade
-0.12*** -0.11*** -0.17*** 1.97 -0.08*** 2.57 (0.03) (0.03) (0.03) (2.81) (0.01) (3.30)
Log(European volume of Atlantic trade) x being an Atlantic port
-0.00 0.03 0.02 0.32 0.01 0.26 (0.05) (0.04) (0.04) (1.34) (0.03) (1.29)
Log(European volume of Atlantic trade) x being an Atlantic port
x starting institutions
0.14*** 0.07* 0.08** 0.37 0.08*** 0.30 (0.04) (0.04) (0.04) (1.75) (0.02) (1.66)
Log(European volume of Atlantic trade) x being part of a country participating to
Atlantic trade x starting institutions
0.15*** 0.10*** 0.17*** 1.90 0.07*** 2.55 (0.03) (0.03) (0.03) (3.10) (0.01) (3.81)
Log(Urban potential) 1.32*** 1.40*** 2.80 1.56*** 3.17 (0.11) (0.12) (0.74) (0.06) (0.77)
Log(European volume of Atlantic trade) xLog(1+ Atlantic port potential)
-0.03** 5.84 -0.02*** 8.76 (0.01) (5.67) (0.01) (6.32)
Log(European volume of Atlantic trade) xLog(1+ Atlantic port potential)
x starting institutions
-0.01*** 6.73 -0.00* 9.31 (0.00) (9.27) (0.00) (10.85)
Constant 3.87*** 1.06*** 0.87*** -0.19 (0.05) (0.24) (0.26) (0.13)
Observations 1,056 1,056 1,056 1,056 5,639 5,639 R-squared 0.94 0.95 0.95 0.95
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
The abundance of interactive variables makes these regressions difficult to interpret
without a study of marginal effects. This is provided by Table 2.
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Table 2: Marginal effects in explaining city size (1) (equation (3))
Balanced panel Summary statistics
HRS: ln(city population) City and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(3) AJR + BBZ +
This paper
Mean: 3.3 S.d.: 0.8
Log(European volume of Atlantic trade) x being an Atlantic port 0.11*** 0.3
(1.3)
Starting institutions 0.29*** 1.1 (0.8)
Log(European volume of Atlantic trade) x being part of a country participating to Atlantic trade 0.02*** 1.9
(2.7)
Log(Urban potential) 1.40*** 2.9 (0.8)
Log(European volume of Atlantic trade) x Log(1+ Atlantic port potential) -0.04 5.7
(5.6)
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
The same exercise can be conducted with estimation of country-specific Atlantic trade,
using Atlantic trade data. We use “Atlantic trade potential” where the share of Atlantic trade
of each port in a country is assumed to be proportional to its population.
Atlantic trade potential of city i = Atlantic trade by Atlantic port kDistance between i and kk≠i
∑
Table 3 gives the results of the regressions. They are similar to the results of preceding
regressions and, again, vindicate the Acemoglu, Johnson and Robinson’s hypothesis.
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Table 3: Explaining city size (2) (BBZ&AJR population data, new trade data)
Balanced panel
Balanced panel
Balanced panel
Summary statistics
Unbalanced panel
Summary statistics
City and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(1) AJR main hypothesis for cities
(2) AJR main hypothesis
+ BBZ
(3) AJR + BBZ
+ This paper
(4)
Explained variable: ln(city population)
3.29 2.53 (0.87) (0.74)
Log(country-specific volume of Atlantic trade) x being part of a country participating to
Atlantic trade
0.09* 0.05 0.05 0.22 0.09*** 0.20
(0.05) (0.05) (0.05) (1.23) (0.03) (1.23)
Log(country-specific volume of Atlantic trade) x being an Atlantic port
0.02 0.04 0.04 0.19 -0.01 0.17 (0.06) (0.06) (0.06) (0.93) (0.03) (0.92)
Log(country-specific volume of Atlantic trade) x being an Atlantic port
x starting institutions
-0.12*** -0.12*** -0.18*** 1.04 -0.10*** 1.65
(0.04) (0.03) (0.04) (1.87) (0.02) (2.38)
Log(country-specific volume of Atlantic trade) x being part of a country participating to
Atlantic trade x starting institutions
0.16*** 0.11*** 0.19*** 1.01 0.10*** 1.71
(0.04) (0.03) (0.04) (2.18) (0.02) (3.01)
Log(Urban potential) 1.23*** 1.25*** 2.80 1.48*** 3.17 (0.12) (0.12) (0.74) (0.06) (0.77)
Log(1+ Atlantic trade potential) -0.07 0.44 -0.20*** 0.76 (0.10) (0.58) (0.05) (0.70)
Log(1+ Atlantic trade potential) x starting institutions
-0.13*** 0.52 -0.04** 0.81 (0.03) (0.90) (0.02) (1.11)
Constant 3.93*** 1.30*** 1.23*** 0.00 (0.04) (0.26) (0.27) (0.13)
Observations 1,056 1,056 1,056 1,056 5,639 5,639 R-squared 0.94 0.95 0.95 0.95
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
Table 4: Marginal effects in explaining city size (2) (equation 3)
Balanced panel 1300-1850
Summary statistics
HRS: ln(city population) City and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(3) AJR + BBZ +
This paper
Mean:3.3 S.d.: 0.8
Log(country-specific volume of Atlantic trade) 0.13*** 1.8 (2.6)
Being an Atlantic port 0.17*** 0.17 (0.38)
Starting institutions 0.16*** 1.16 (0.7)
Log(Urban potential) 1.2*** 2.8 (0.7)
Log(1+“Atlantic trade potential”) -0.22 1.7 (2.5)
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
16
However, spatial autocorrelation might be an issue with these results. A city has an
influence on the urban potential of neighboring cities. This increases their size. This, in return,
is linked to a larger size for the initial city. Sorting these relationships out would require
proper spatial econometrics. Furthermore, the link between national Atlantic trade and city
size might be endogenous, as one suspect that larger cities would attract more trade. One
solution is to look at the growth rate of cities rather than at their size. This reduces the number
of observation, but solves both the endogeneity and the spatial correlation issues.
Table 5 conducts the same regressions, but uses city growth rate as the right hand side
variable. The city size has been introduced as an explanatory variable to take into account the
fact that larger cities have a priori less growth potential because of the increased issues of
pollution, supply, etc. This variable has the expected negative sign.
The coefficients of our main variable of interest are strikingly different, especially with
regression 3. In the balanced panel, a city in a country which took part to Atlantic trade,
whether an Atlantic port or not, does not seem to have grown any faster than any other city. It
seems to grow a little slower in equation 1 and 2. The crucial variable becomes the “Atlantic
trade potential”. If one believes regression (3), the positive effect of Atlantic trade on the
growth of city is only local, and is not dependent on the quality of institutions. It might even
be stronger when starting institutions are bad.
Regression (4) uses the full dataset. Its results are less surprising. Cities in countries
involved in Atlantic trade grow slower than other cities, except when they benefit from good
national institutions. ????Cities nearby Atlantic ports grow as well even faster if they benefit
from good institutions.???? Still, this does not prevent the existence of local, non-institutional
based, positive effects of Atlantic trade on city growth.
17
Table 5: Explaining city growth (1300-1800)
(BBZ&AJR population data, new trade data)
Balanced panel
Balanced panel
Balanced panel
Summary statistics
Unbalanced panel
Summary statistics
City and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(1) AJR main hypothesis for cities
(2) AJR main hypothesis
+ BBZ
(3) AJR + BBZ
+ This paper
(4)
Explained variable: annual urban population growth*100
0.21 0.41 (0.56) (0.69)
Log(city population) -0.49*** -0.49*** -0.49*** 3.21 -0.60*** 2.56 (0.04) (0.04) (0.04) (0.83) (0.03) (0.74)
Log(country-specific volume of Atlantic trade) x being part of a country participating to
Atlantic trade
0.03 0.03 0.05 0.18 0.05 0.20 (0.07) (0.07) (0.07) (1.06) (0.05) (1.14)
Log(country-specific volume of Atlantic trade) x being an Atlantic port
0.06 0.06 0.06 0.16 0.06 0.16 (0.08) (0.08) (0.08) (0.80) (0.06) (0.82)
Log(country-specific volume of Atlantic trade) x being an Atlantic port
x starting institutions
-0.16*** -0.16*** -0.20*** 0.84 -0.19*** 1.35 (0.05) (0.05) (0.05) (1.60) (0.03) (1.99)
Log(country-specific volume of Atlantic trade) x being part of a country participating to
Atlantic trade x starting institutions
0.16*** 0.16*** 0.17*** 0.81 0.17*** 1.42
(0.05) (0.05) (0.05) (1.86) (0.03) (2.58)
Log(Urban potential) 0.00 -0.10 2.63 0.28** 2.87 (0.19) (0.19) (0.60) (0.13) (0.61)
Log(1+ Atlantic trade potential) 0.66*** 0.28 0.44*** 0.45 (0.18) (0.37) (0.12) (0.44)
Log(1+ Atlantic trade potential) x starting institutions
-0.28*** 0.33 -0.25*** 0.51 (0.08) (0.58) (0.05) (0.72)
Constant 1.76*** 1.76*** 2.00*** 1.26*** (0.17) (0.41) (0.41) (0.27)
Observations 924 924 924 924 3,371 3,371 R-squared 0.56 0.56 0.57 0.68
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
Table 6: Marginal effects in explaining city growth (1300-1800) (equation 3)
Balanced panel
Summary statistics
HRS: annual growth rate *100 City and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(3) 0.3 (0.7)
Log(city population) -0.49*** 3.21 (0.83)
Log(country-specific volume of Atlantic trade) 0.08 1.3
(2.0)
Being an Atlantic port 0.14** 0.1 (0.4)
Starting institutions 0.10 1.2 (0.8)
Log(Urban potential) -0.10 2.6 (0.6)
Log(1+“Atlantic trade potential”) 0.32*** 0.6 (0.7)
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
18
3. Explaining regional urban growth
They are two reasons to go further than Table 5.
The first one is that the panel setting poses a dilemma. Using a balanced panel is more
consistent, but it restricts the sample to 10% of 19th century European cities. Still, something
could be happening with new cities. It might be the case that Atlantic trade is not important
for the growth of established cities but encourages the growth of market towns such that some
become cities. This is all the more plausible as established cities have often more options for
internal growth whereas smaller urban locations might be on the lookout for external sources
of growth.7 If that is true, the balanced panel equation will show no role of Atlantic trade on
city growth, whether the Unbalanced panel will show one. In order to both take into account
new cities and keep a balanced dataset, it would be useful to continue the analysis at the
regional level.
The second one is that Acemoglu, Johnons and Robinson do not conclude their economic
analysis with the analysis of city growth. On the contrary, their final regressions are at the
country level. They use Bairoch’s database and total population figures to compute the
urbanization rate of European countries, and use this as their main proxy of economic growth.
However, if we were to move the analysis to the national level, we would, by definition, be
incapable of measuring any the local effects: they would become invisible and be “absorbed”
in the national effect. Hence again, we would like to find an intermediary scale of spatial
analysis.
There are two difficulties. The first one is that there is no consistent dataset of regional
population from 1300 to 1850: hence, it is not possible to compute regional urbanization rates.
As a proxy, we will use regional urban population. The second difficulty is that regions are
not easily comparable between European nations in terms of size and history. To solve these
7 Richard Sullivan suggested this idea.
19
difficulties, we use a Geographical Information System (GIS) software to divide Europe into
arbitrary regions.
These regions are squares seventy-five kilometer wide. When a square includes two or
more countries, we divide into one region per country. We then compute the urban population
in each region at each point of time. These regions will be our unit of analysis. Figure 4
contrasts this new view with the city-based view.
Figure 4: Two views of European urbanization in 1300
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Table 7 shows the results of the region-based analysis. The balanced panel includes only
113 regions (against 193 cities), but these 113 regions themselves include 684 cities in 1850.
In the balanced regressions, we have increased the sample from 10% of the total population of
19th century cities to nearly one third. Including an Atlantic port does not increase the rate of
urban growth in a region. Atlantic trade in itself decreases urban growth, but with good
institutions it encourages it: again, the Acemoglu, Johnson and Robison hypothesis is
confirmed. Being near domestic Atlantic ports also increases urban growth, unconditional on
starting institutions.
20
Table 7: Explaining regional urban growth (1300-1850)
Balanced panel
Balanced panel
Balanced panel
Summary statistics
Unbalanced panel
Summary statistics
Region and year dummies everywhere
Western Europe x year dummies everywhere Weighted by region populations
(1) AJR main hypothesis for cities
(2) AJR main hypothesis
+ BBZ
(3) AJR + BBZ
+ This paper
(4)
Explained variable: annual urban population growth*100
0.40 0.58 (0.71) (0.90)
Log(region population) -0.57*** -0.60*** -0.63*** 3.86 -0.68*** 3.35 (0.06) (0.06) (0.06) (1.00) (0.05) (1.04)
Log(country-specific volume of Atlantic trade) x including an Atlantic port
-0.16** -0.16*** -0.24*** 0.86 -0.24*** 0.98 (0.06) (0.06) (0.06) (1.61) (0.06) (1.76)
Log(country-specific volume of Atlantic trade) x including an Atlantic port
x starting institutions
0.12 0.11 0.10 0.25 0.12 0.39
(0.10) (0.10) (0.10) (0.98) (0.09) (1.27)
Log(country-specific volume of Atlantic trade)) -0.06 -0.06 -0.04 0.24 -0.05 0.43 (0.08) (0.08) (0.08) (1.14) (0.07) (1.60)
Log(country-specific volume of Atlantic trade) x starting institutions
0.16*** 0.15** 0.21*** 0.80 0.22*** 0.96
(0.06) (0.06) (0.06) (1.83) (0.05) (2.10)
Log(Urban potential) 0.81** 0.76* 2.43 0.87** 2.48 (0.40) (0.42) (0.59) (0.37) (0.58)
Log(1+ Atlantic trade potential) 0.62*** 0.25 0.46** 0.31 (0.20) (0.33) (0.18) (0.33)
Log (1+ Atlantic trade potential) x starting institutions
-0.42*** 0.24 -0.36*** 0.27 (0.09) (0.45) (0.08) (0.48)
Constant 2.27*** 0.74 0.95 0.88 (0.25) (0.80) (0.83) (0.71)
Observations 686 686 686 686 1,334 1,334
R-squared 0.58 0.59 0.60 0.65 *, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
Considering the number of interactive variables in this regression, the computation of
marginal effect helps understanding the role of each individual variable. Table 8 suggests that,
on the whole, the effect of starting institutions is not very precisely measured and is smaller
than the effect of the Atlantic trade potential. One standard deviation change in starting
institutions increases the annual growth rate of the regional urban population by 5.5 per cent
of its standard deviation. One standard deviation change in the log of (1+Atlantic trade
potential) increases the annual growth rate of the regional urban population by 17 per cent of
its standard deviation8.
8 Remember these effects exclude the regional dummies. These would certainly increase the effect of both variables.
21
Table 8: Marginal effects in explaining regional urban growth (equation (3))
Balanced panel Summary statistics
HRS: annual growth rate *100 Region and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(3) 0.4 (0.71)
Log(regional urban population) -0.63*** 3.9 (1.0)
Log(country-specific volume of Atlantic trade) -0.06** 2.0 (1.8)
Including an Atlantic port 0.11* 0.2 (2.4)
Starting institutions -0.36 1.2 (2.5)
Log(Urban potential) 0.8** 2.4 (0.6)
Log(1+“Atlantic trade potential”) 0.14 1.8 (0.4)
*, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels
Figure 5 confirms that the local effect of Atlantic trade was larger than its national effect.
It shows four different evolutions of the urban population of Western Europe: the actual one,
the one predicted by equation 4 in Table 7, the one predicted by the same equation assuming
that Atlantic trade had no national effect and the one predicted assuming Atlantic trade had no
local effect. In 1850, the predicted urban population in Western Europe would have been 6%
smaller without the national effect of Atlantic trade and 15% smaller without the local effect
of Atlantic trade.
22
Figure 5: Counter-factual of the evolution of Western European urban population,
1300-1850
It might be the case that the results in Table 7 and Table 8 are dependent on the specific
regional partition we have chosen. To test their robustness, we generate 1,000 different
regional partitions by varying the size of regions (from 2,500 square kilometers to 22,500
square kilometers – the square length is drawn from an uniform distribution between 50 and
150 kilometers) and the starting point of the partition (North-West, North-East, South-East or
South-West corner of Europe).
Following the standard aggregation method in meta-analysis, Table 9 presents the
weighted mean of the regression coefficient, where the weights are the reciprocal of the
standard errors of each coefficient (Deeks, Altman, et Bradburn 2001). Non weighted means
are nearly the same as weighted means. Meta-analysis methods cannot help us to compute the
relevant standard error, as our 1000 samples are not independent from one another: Table 9
reports the weighted mean of the standard errors among the samples.
23
Table 9: Explaining regional urban growth (1300-1800) – 1000 samples
Weighted mean of the regression coefficient (weighted mean of the standard error) Balanced panel Balanced panel Balanced panel Summary
statistics Unbalanced
panel Summary statistics
HRS: annual growth rate *100 Region and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(1) (2) (3) 0.4 (0.7) (4) 0.6
(1.0)
Log(regional urban population) -0.51*** (0.04)
-0.54*** (0.05)
-0.53*** (0.05)
3.2 (0.7)
-0.68*** (0.03)
4.5 (1.4)
Log(country-specific volume of Atlantic trade) -0.20*** (0.06)
-0.20*** (0.06)
-0.24*** (0.06)
2.0 (2.7)
-0.30*** (0.05)
1.9 (2.6)
Log(country-specific volume of Atlantic trade) x including an Atlantic port
0.20** (0.09)
0.20** (0.09)
0.17* (0.09)
1.0 (2.2)
0.17** (0.08)
0.8 (2.0)
Log(country-specific volume of Atlantic trade) x including an Atlantic port
x starting institutions
-0.16** (0.07)
-0.16** (0.07)
-0.13* (0.07)
1.4 (3.3)
-0.14** (0.06)
1.1 (3.0)
Log(country-specific volume of Atlantic trade) x starting institutions
0.25*** (0.05)
0.24*** (0.05)
0.25*** (0.06)
2.4 (3.7)
0.31*** (0.04)
2.2 (3.6)
Log(Urban potential) 0.37 (0.24)
0.19 (0.24)
3.2 (0.7)
0.42** (0.19)
3.7 (0.7)
Log(1+“Atlantic trade potential”) 0.75*** (0.18)
0.7 (0.7)
0.65*** (0.14)
0.7 (0.7)
Log(1+“Atlantic trade potential”) x starting institutions -0.29***
(0.08) 0.9
(1.1) -0.24***
(0.06) 0.8
(1.1)
Mean adjusted R-squared (unweighted) 0.48 0.49 0.50 0.46
Mean number of observations (unweighted) 986 986 986 2498
The columns of equation (1), (2), (3) and (4) provide the weighted mean of the regression coefficient and the weighted mean of the standard error. The weight is the standard error of each individual regression in each sample. The “Summary statistics” columns provide the unweighted mean of the sample means and the unweighed mean of the standard deviations. *, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels, using reported numbers and assuming 800 degrees of freedom.
24
Table 10: Marginal effects in explaining regional urban growth (equation (3)) – 1000
samples
Balanced panel Summary statistics
HRS: annual growth rate *100 Region and year dummies everywhere
Western Europe x year dummies everywhere Weighted by city populations
(3) 0.4 (0.7)
Log(regional urban population) -0.51 3.2 (0.7)
Log(country-specific volume of Atlantic trade) -0.21 (0.15)
2.0 (2.7)
Including an Atlantic port 0.02 (0.06)
0.2 (0.4)
Starting institutions -0.14 (0.14)
1.2 (0.7)
Log(Urban potential) 0.19 (0.24)
3.2 (0.7)
Log(1+“Atlantic trade potential”) 0.39*** (0.13)
0.7 (0.7)
The column of (3) provides the weighted mean of the marginal effect and the weighted mean of the its standard error. The weight is the standard error of each individual regression in each sample. The “Summary statistics” columns provide the unweighted mean of the sample means and the unweighed mean of the standard deviations. *, ** and *** indicate statistical significance at 10, 5 and 1 per cent levels, using reported numbers and assuming 800 degrees of freedom.
4. Conclusion
After presenting some possible justifications for the positive effect of Atlantic trade on
early modern European growth, this paper has shown through the study of city size, city
growth and regional urban growth that, even if the mechanism suggested by Acemoglu,
Johnson and Robison is indeed important, it is not the only one. The evolution of national
institutions was not the only channel through which Atlantic trade had a positive effect on
European growth. Local effects also existed. Our preferred specification even suggests that
these effects were much larger than the ones going through national institutions.
25
5. Appendix
Table 11: Explaining city size, 1300-1850 (AJR population data)
Balanced panel
Balanced panel
Balanced panel
Summary statistics
Unbalanced panel
Summary statistics
City and year dummies everywhere
Western Europe dummies everywhere Weighted by city populations
(1) AJR main hypothesis for cities
(2) AJR main hypothesis
+ BBZ
(3) AJR + BBZ
+ This paper
(4)
Explained variable: ln(city population)
3.41 2.55 (0.86) (0.73)
Log(European volume of Atlantic trade) x being an Atlantic port
-0.06 -0.02 -0.03 0.31 0.01 0.26 (0.05) (0.05) (0.05) (1.29) (0.03) (1.27)
Log(European volume of Atlantic trade) x being an Atlantic port
x starting institutions
0.22*** 0.14*** 0.16*** 0.28 0.09*** 0.30 (0.05) (0.05) (0.05) (1.32) (0.02) (1.63)
Log(European volume of Atlantic trade) x being part of a country participating to
Atlantic trade
-0.13*** -0.12*** -0.20*** 1.92 -0.07*** 2.53 (0.03) (0.03) (0.03) (2.72) (0.02) (3.24)
Log(European volume of Atlantic trade) x being part of a country participating to
Atlantic trade x starting institutions
0.18*** 0.13*** 0.25*** 1.77 0.07*** 2.52 (0.04) (0.03) (0.04) (2.77) (0.02) (3.75)
Log(Urban potential) 0.99*** 1.07*** 2.77 1.48*** 3.19 (0.13) (0.13) (0.76) (0.06) (0.77)
Log(European volume of Atlantic trade) xLog(1+ Atlantic port potential)
-0.05*** 5.53 -0.03*** 8.73 (0.01) (5.45) (0.01) (6.19)
Log(European volume of Atlantic trade) xLog(1+ Atlantic port potential)
x starting institutions
-0.01*** 6.29 -0.00* 9.28 (0.00) (8.47) (0.00) (10.71)
Constant 3.89*** 1.87*** 1.64*** 0.09 (0.05) (0.26) (0.27) (0.12)
Observations 824 824 824 824 5,445 5,445 R-squared 0.94 0.95 0.95 0.95
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