An important class of active labor market policy has received little rigorous impact evaluation: immigration barriers intended to improve the terms of employment for domestic workers by deliberately shrinking the workforce. Recent advances in the theory of endogenous technical change suggest...

The effect of foreign labor on native employment within an occupation depends on native labor supply to that occupation – which is rarely directly measured – even if native and foreign labor are perfect substitutes in production. This paper uses two natural quasiexperiments to directly...