The inverse relationship between land productivity and farm size is an old and puzzling empirical regularity. Most explanations for this relationship rely on market imperfections that jointly determine the farm size and the household's shadow price of some productive inputs. We use plot-level...

The Roy model predicts that migrants will be disproportionately drawn from the lower half of the educational distribution of the sending country if the sending country has a higher return to schooling. However, Mexican immigrants in the U.S. tend to be disproportionately drawn from the middle of...