In this paper we assess the importance of heterogeneity and selectivefertility in altering estimates and interpretations of the determinants ofthe human capital of children. We set out a sequential model of humancapital investments in children incorporating endogenous fertility andheterogeneity...

This paper investigates the determinants of rice seed variety choice inIndonesia with respect to a meta-profit function. Varietal choice ismodeled as depending on the profitability of high yielding varieties of seedrelative to traditional varieties of seed, the schooling of cultivators...

The identification and estimation of a semiparametric simultaneous equation model with selectivity have been considered. The identification of structural parameters from reduced form parameters in the semiparametric model requires stronger conditions than the usual rank condition in the...