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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: Soc Sci Res. 2017 May 13;67:160–175. doi: 10.1016/j.ssresearch.2017.05.002

Table 2.

Description of between-sibling variation in measures

Key measures Wave Proportion of discordant siblings R-squared
Volunteering 3 0.528 0.61
Volunteering 4 0.562 0.61
Voting 3 0.536 0.68
Voting 4 0.534 0.66
Depression scale 3 0.924 0.62
Depression scale 4 0.942 0.59
Years of schooling 4 0.712 0.77
Log earning 4 0.984 0.68
Youth volunteering (voluntary) Age 12–18 0.552 0.63
Youth volunteering (involuntary) Age 12–18 0.357 0.62

Note. The proportion of discordant siblings was derived by calculating the standard deviation of each measure within a family, and then families with standard deviations more than zero were put in the discordant group. The R-squared was obtained from a regression of each measure on a full set of family dummies.