How Large are the Effects from Changes in Family Environment? A Study of Korean American Adoptees
利用准随机分配到不同家庭的韩裔美国被收养者数据，发现父母教育水平和家庭规模对被收养者的教育、收入和健康有显著影响，且共享家庭环境解释了教育成就14%的变异。
I analyze a new set of data on Korean American adoptees who were quasi-randomly assigned to adoptive families. I find large effects on adoptees' education, income, and health from assignment to parents with more education and from assignment to smaller families. Parental education and family size are significantly more correlated with adoptee outcomes than are parental income or neighborhood characteristics. Outcomes such as drinking, smoking, and the selectivity of college attended are more determined by nurture than is educational attainment. Using the standard behavioral genetics variance decomposition, I find that shared family environment explains 14 percent of the variation in educational attainment, 35 percent ofthe variation in college selectivity, and 33 percent of the variation in drinking behavior.