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Social capital and perceived happiness:some evidence and issues
Takashi OshioHitotsubashi University
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Two questions to be addressed
Question 1Is the observed association between social capital (SC) and perceived happiness (PH) real or spurious?
Question 2Which is more important for PH, area-level SC or individual-level SC?
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Question 1
Is the observed association between SC and PH real or spurious?
SC is often subjectively (and individually) assessed.
Both SC and PH are likely affected by various factors including sociodemographic and socioeconomic factors as well as personality traits.
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Social capital Perceived happiness
Sociodemographic and socioeconomic factors,
personality traits, and others
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Question 2
Which is more relevant for PH, area-level SC or individual-level SC?
SC is often individually (and subjectively) assessed [“Individual SC”] …
… but the original concept of SC is contextual.
Researchers sometimes use individual-level SC as if it was area-level one.
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Area-level social capital
A
Individuals
B C D
Individual-level social capital
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How to address Question 1
(Pooled) cross-sectional analysis Controlling for Nothing (except for sex and age) + Marital status and family factors + SES + Personality traits
Panel analysis Controlling for time-invariant fixed effects
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Methods to address Question 2
Multi-level analysis
Construct area-level SC.
Examine whether PH is associated with area- level SC even after controlling for individual-level SC.
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Study sample (1)
Micro-level data obtained from a 3-wave nationwide Internet survey in Japan
Conducted: 1st wave in January 2011 2nd wave in January 2012 3rd wave in October 2012.
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Study sample (2)Sample 1st wave 10,826 (response rate: 68.3%) 2nd wave 8,056 (attrition rate from 1st : 25.6%) 3rd wave 6,491 (attrition rate from 1st : 40.0%)
Potential biasesSex proportion skewed toward men (55.4%)More educated than the actual populationMore than 1/3 living in the Tokyo Metropolitan Area
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Key variables (1)
Trust (11-point scale)“On a scale from 0–10, please tell us how much you basically trust people.”
Perceived happiness (PH) (11-point scale) “On a scale from 0–10, please rate you overall level of happiness. ”
Self-rated health (SRH) (5-point scale)“Please tell us about your state of health .”
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Distributions of trust and PH
12N = 22,501
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Distribution of SRH
13N = 22,501
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Key variables (2)
Construct binary variables to divide the respondents into groups of roughly-equal halves:
Higher trust score ≥ 6 (covering 53.4%)Higher perceived happiness score ≥ 7 (covering 48.6%)Better self-rated health score ≥ 4 (covering 46.2%)
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Controls (1)
Demographics Sex; age (20s, 30s, 40s, 50s, 60s and over)
Marital status Never married, married, divorced, widowed
Family variables Having a kid(s); Residing with a parent(s) and/or parent(s)-in-law
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Controls (2): SES
Household spending Household-size-adjusted
Educational attainment Junior high school, high school, junior college, college or above
Occupational status Working, unemployed, out of labor force
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Controls (3): Personality
Big five inventoryAsked in 1st waveFive aspects of personality
extraversion, agreeableness, conscientiousness, neuroticism, and openness
Constructed from 44 items
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Results for Question 1
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Positive association b/w trust and PH
19N = 22,501
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Positive association b/w trust and SRH
N = 22,501
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…. but the observed associations may be substantially attributable to other factors!
21N = 22,501
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Pooled OLS models
Dependent variable = PH score (range 0-10)Independent variable = 1 (trust score ≥ 6)
Model Controlled for:Model 1: sex, ages, and waves (benchmark)Model 2: + marital status and family variablesModel 3: + SESModel 4: + personality traits
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Fixed-effects model
Dependent variable: PH score (range 0-10)
Independent variable: 1 (trust score ≥ 6)
Additionally control for time-invariant fixed-effects
Use data from three waves
Mean-centered FE model
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Logistic models for pooled and panel data
Replace the linear dependent variable with 1 (PH score ≥ 7)
For fixed-effects models, use only respondents who experienced changes in PH scores across 7 at least once during the three waves.
Models 1-4 (pooled) and 5 (fixed-effects)24
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Results of linear models
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Results of logistic models
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How about SRH?
Dependent variable
Linear models: SRH score (range 1-5) Logistic models: 1 (SRH score ≥ 4)
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Similar results for SRH
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Linear Logistic
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Results for Question 2
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Construct area-level SC
• It is often difficult to capture area-level SC, especially if SC is subjectively assessed.
• One reasonable solution is to aggregate individuals’ assessments by averaging across individuals by area (Diez-Roux, 2007; Mujahid et al., 2007; Oshio and Urakawa, 2012).
• But note that we cannot be free from the “same source biases” (Diez-Roux, 2007).
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Focus on the first three digits of the postal code
E.g.
Correspond to the location of each local municipality.
In the original dataset, the total number of the three-digit areas was 885, and the number of respondents who lived in the same three-digit area ranged from 1 to 100 (M 23.4; SD 17.1).
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6 1 6 8 0 1 5
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Focus on the first three digits of the postal code (cont.)
Focus on areas with 20 residents or more.
Calculate the proportion of those who assess trust ≥ 6
Then, divide areas into higher- and lower-trust areas, taking the median (0.51) of the proportion of those who highly trust people as a cutoff point.
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Distribution of proportions of those who highly trust people (# of areas =192)
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Dependent variable: PH score (range 0-10) or 1 (PH score ≥ 7)
Individual-level trust: 1 (trust score ≥ 6)
Area-level trust : 1 (higher trust)
Using data from the 1st wave only
Sample size: N = 5,033 (192 areas)
ICC very small (< 1%)34
Multi-level OLS/logistic models
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Model Independent variable(s)
Model 6: Individual-level trustModel 7: Area-level trustModel 8: Individual-level trust + Area-level trust
(all models controlling for variables used in Model 4)
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Multi-level OLS/logistic models (cont.)
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Results of multi-level OLS models
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Results of multi-level logistic models
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How about other SC variables?
Interactions with neighbors - Frequency - Wideness
Participation in social activities- Regional activities (neighborhood groups and associations)- Sports, hobby, and amusement activities- Volunteer, NPO, civic, and other similar types of activities
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Results of multilevel logistic models
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PH is not associated with area-level trust, after controlling for individual-level trust.
Odds ratios (N = 5,033)
Dependent variable = happiness ( ≥ 7)
SC level
Frequent interactions with neighbors 1.33 *** 1.09 1.32 *** 1.05
Wide interactions with neighbors 1.31 *** 1.16 * 1.28 *** 1.11
Regional activities 1.24 *** 1.12 1.22 *** 1.08
Sports, hobby, and amusement activities 1.46 *** 1.06 1.46 *** 1.01
Volunteer, NPO, and civic activities1.27 * 1.15 * 1.23 * 1.13
***p < 0.001, **p < 0.01, *p < 0.05.
AreaIndividualAreaIndividual
Model 6 Model 7 Model 8
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Discussion and conclusion
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Questions (again)
Question 1Is the observed association between SC and PH real or spurious?
Question 2Which is more relevant for PH, area-level SC or individual-level SC?
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Re: Question 1 (1)Findings: Controlling for marital status, family
factors, socioeconomic factors, personality, and unobserved time-invariant fixed effects reduces the magnitude of the association by 65% (OLS) or 43% (logistic).
Suggest that the observed association between (individual-level) SC and PH is substantially overstated by other factors.
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Re: Question 1 (2)
These results are reasonable, given that trust and PH in this study are both subjectively assessed by each respondent.
However, trust does matter. Its association with PH remains highly significant even after controlling for various potential confounders.
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Re: Question 2
PH is much more closely associated with individual-level trust than area-level trust.
Three-digit areas may be too large to capture area-level variations.
Even if that is the case, results point to the risk that individual-level SC overstates the role played by SC, which is originally a contextual concept.
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Future research issues (1)
Dynamism of SC
How is SC created, sustained, and strengthened by individuals/community?
SC is most likely to be endogenously determined by interactions with others.
With limited knowledge about the dynamism of SC, we should be cautious in using SC as an independent variable in regression.
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Future research issues (2)
Relative importance of SC as a determinant or correlate of an individual’s subjective and objective well-being.
Can high SC offset low SES?
How much can we expect from SC, especially when we try to employ policy measures to enhance it?
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Appendix: Relative importance of SC for K6 scores (men) : fixed-effects model
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(Oshio, 2014)
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Relative importance of SC for K6 scores (women) : fixed-effects model
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(Oshio, 2014)
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Thank you for your attention!
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