“…This strand of research is motivated, in part, by significant influence of an individual's genetic endowment on achievable economic outcomes and strong dependence of the distribution of human capital on the distribution of abilities and rates of illness in population and on the transmission of genes through generations (see, among others, Becker, 1993, Ch. 4, 5, Currie, 2000, Frank and McGuire, 2000, Haveman and Wolfe, 2000, Zak, 2002. It was demonstrated in a number of studies that heritability is significant and often exceeds environmental effects for many human psychological, psychiatric and neurological phenotypes affecting human capital in an economy (e.g., Ehrman and Parsons, 1977, the contributions in Fuller and Simmel, 1983, Plomin, deFries and McClearn, 1990, Plomin, Owen and McGuffin, 1994, Rowe, 1994, and Gilger, 2000.…”