When a treatment unambiguously defines the treatment and control groups at a given time point, its effects are usually found by comparing the two groups' mean responses. But there are many cases where the treatment timing is chosen, for which the conventional approach fails. This paper sets up...

We analyse the impact of different immigration policies on human capital investment in a search-theoretic model. This class of model features unemployment and underinvestment in human capital. We show that an immigration policy aiming at well educated immigrants leads to rising educational...