A remarkable degree of self-sufficiency is a distinguishing feature of the typical Third World family farm. However, many family farms deviate from this pattern and engage in transactions involving land and labor. The question is why some households use land and labor markets while others do...

When multiple durations are generated by a single unit, they may be related in a way that is not fully captured by the regressors. The omitted unit-specific variables might vary over the durations. They might also be correlated with the variables in the regression compenent. We propose an...