This paper shows that the frequency of migration can be best modeled by a zero-inflated Poisson process, because it takes into account the overwhelming presence of zeros (nonmigrants) in the data. A failure to do so can cause the coefficients to be biased and also result in poor prediction. The...

In this study, earnings are decomposed in order to measure the effects due to individual characteristics and to unobserved heterogeneity. These effects are shown to work in opposite directions, complicating the effect of earnings on migration. The use of aggregate earnings masks the two separate...

The errors-in-variables (EIV) problem is pervasive in econometrics but has not received the attention it deserves, perhaps because it is difficult to resolve. The first objective of this paper is to demonstrate the effectiveness of recently developed methods to deal with the EIV problem in...