This chapter covers recent solutions to aggregation problems in three application areas: consumer demand analysis, consumption growth and wealth, and labor participation and wages. Each area involves treatment of heterogeneity and nonlinearity at the individual level. Three types of...

Sample selection is pervasive in applied economic studies. This paper develops semiparametric selection models that achieve point identification without relying on exclusion restrictions, an assumption long believed necessary for identification in semiparametric selection models. Our...

We investigate the extent to which deficiency at English as measured by English as Additional Language (EAL), contribute to the immigrant-native wage gap for female employees in the UK, controlling for covariates. To deal with the endogeneity of EAL and a substantial problem of self-selection...

The purpose of this study is to estimate whether sexual activity is associated with wages, and also to estimate potential interactions between individuals' characteristics, wages and sexual activity. The central hypothesis behind this research is that sexual activity, like health indicators and...

This paper analyses immigrants' education-occupation mismatch as well as its impact on their wages in Spain. Using cross-sectional data from the National Immigrant Survey of Spain 2007, we estimate a probit model taking into account the possible problem of selection bias. We show that the...

Identification in most sample selection models depends on the independence of the regressors and the error terms conditional on the selection probability. All quantile and mean functions are parallel in these models; this implies that quantile estimators cannot reveal any - per assumption...