A semiparametric estimator for evaluating the parameters of data generated under a sample selection process is developed. This estimator is based on the generalized maximum entropy estimator and performs well for small and ill-posed samples. Theoretical and sampling comparisons with parametric...

Empirical evidence from agricultural labor markets is consistent with efficiency-wage theory and inconsistent with several alternative explanations. According to this theory, the higher wage or deferred payment (benefits) that direct-hire growers pay relative to that of farm labor contractors is...