. Author manuscript; available in PMC: 2013 Oct 25.

Published in final edited form as: Soc Sci Res. 2011 Nov 15;41(2):10.1016/j.ssresearch.2011.11.010. doi: 10.1016/j.ssresearch.2011.11.010

Table 1.

Within and Between Family Variation in Schooling: 1995–1996 MIDUS

	Ordinary Sibling Sample	Fraternal Twin Sample	Identical Twin Sample
Variation Within Families	31%	24%	15%
Variation Between Families	69%	75%	85%