the mutability of altruism: a perspective from economics david clingingsmith case western reserve...
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The Mutability of Altruism: A Perspective from Economics
David ClingingsmithCase Western Reserve University
Workshop in Multidisciplinary Philanthropy Studies, IUPUI
May 1st, 2014
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How are sharing choices made when there is both earned and windfall income?
1. Neo-classical theory– All income is fungible, so whether we consider it windfall
or earnings doesn’t matter.
2. Mental accounting– Income from different sources at least partly infungible.– Income sources linked to appropriate uses.
3. Choice bracketing– Sometimes we ignore the big picture.
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Determine Causality
Distinguish Mechanisms
External Validity
Policy Relevance
Special Populations
Lab Experiments ★★★ ★★★ ★★ ★★ ★Field Experiments ★★ ★★ ★★★ ★★★ ★★Natural Experiments ★★ ★ ★★ ★★★ ★★★Observational Data ★ ★ ★★★ ★★ ★★★
What kind of experiment to run? 1. Manipulate mental accounts of actual
potential donors to a charity in the field through priming.
2. Create a controlled setting where participants earn income, receive windfalls, and choose whether or not to share.
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Field Experiments in Charitable Giving
• How do we increase the number, gift size, or long-term commitment of charitable donors?
• Systematic study of alternative methods of approaching potential donors.– Matching grants, seeds, refunds, rebates.– Information on behavior of others.– Leveraging social connections.– Once and done. – Overcoming avoidance.
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Dictator Game
Person 1 (“dictator”) is endowed with $E and asked to choose amount between $0 and $E to give to person 2 (“receiver”) who is anonymous.
Over many experiments, 70% of subjects sharing something and mean amount shared about $⅓E (Camerer 2003).
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The Mutability of Altruism
• An emerging literature suggests the degree of dictator sharing is sensitive to contextual and framing effects that impact neither possible choices nor resources.
• Making the consequences of choice less “direct” seems to reduce sharing.
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Dictators share less when…
1. They can explicitly opt-out (Lazear et. al. 2012).2. They can delegate to a stingy intermediary (Hamman et
al 2010).3. They will remain uncertainty about amount actually
received (Dana et. al. 2006, 2007).4. They can take as well as give (List 2007).5. They allocate tokens rather than cash (Mazar et al 2008).6. They are primed with moral ideas (Mazar et al 2008).
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Mental Accounts and Sharing
• How are sharing choices affected by the relative size of earned and windfall income?
• Recruit participants to play a dictator game.– Dictator accumulate money via• Completing a number-matching task in which they are
paid based on matched completed.• A randomly drawn windfall.
– Dictators decide how much of the accumulated money to share with a receiver.
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Number-matching task• Select two numbers that sum to 100.
• No feedback, auto-advance.• Not difficult, but requires focus.
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Earned Income e
Windfall w
e0
w0
Goal: Measure how marginal willingness to share varies with relative size of earnings and windfall
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Task: 180sWindfall: ME(Earnings)=25E(Windfall)=15
B A
Task: 180sWindfall: HE(Earnings)=25E(Windfall)=25
B A
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Framed field experiment with online workers.1. Use online labor market in distributed outsourcing
industry (Mechanical Turk).– In this market, workers do short, discrete tasks that can be
completed using a browser. – Example tasks: Image classification, data entry and validation,
audio transcription, blog commenting, searches, surveys.
2. Employers create a task that appears in a list visible to workers. – A description and wage offer are included. – Workers accept the task and complete it. – Employers review work and release payment.
3. Subjects are mTurk workers in India. – Main job for many of them. – Average pay is about $10/hour.
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Sharing choice:
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Marginal Willingness to Share
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Marginal Willingness to Share by Fraction Earned
Plots are coefficients from a local-linear kernel regression
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Marginal Willingness to Share by Fraction Earned
Largest: WindfallSmallest: Earnings
Largest: EarningsSmallest: Windfall
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Is the qualitative difference between earnings and windfall essential?– Follow-up with two accounts, but both
containing windfall. – Same realized values in the accounts as before.– Dictators learned of the windfall amounts
sequentially, and they were separated by demographic and attitude questions.
– N=292
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Marginal Willingness to Share: Two Windfalls
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Marginal Willingness to Share by Fraction from Second Windfall
Plots are coefficients from a local-linear kernel regression
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What did receivers expect to get?
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Marginal Expectation to Receive
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Marginal Expectation to Receive by Fraction Earned
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Conclusions from the experiment1. Participants treat earned and windfall income as
only partially fungible.2. Participants paid selective attention to the largest
source. Marginal sharing was lowest when the sources were most mixed.
3. It matter that the two accounts were substantively different.
4. Receivers are both over-optimistic and expect more from mixtures rather than less.
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Ambiguity and Pro-social Behavior (Mazar, Amir, and Ariely 2008; Benabou & Tirole 2011)
1. Agents value perceiving themselves as pro-social. 2. They update their perceptions of themselves based on actions
they take. (Imperfect self knowledge.)3. An ambiguous action is a relatively noisy signal. Less impact on
the prior than an unambiguous one.4. RESULT: Agents will take more selfish actions when actions send
a noisy signal, i.e. when they are ambiguous.
Related to “cognitive dissonance” in psychology (Festinger 1957). – Tendency to resolve contradictions between our actions and
self-concept in our favor, if they are small enough.– Self-serving selective attention to information common when
interpreting information relevant to one’s payoffs or self-image. (Hastorf & Cantril 1954; Larwood & Whittaker 1977; Svenson 1981; Ross & Sicoly 1982; Babcock et al 1995; Babcock and Loewenstein 1997).