Economists are increasingly turning to the experimental method as a means to estimate causal effects. By using randomization to identify key treatment effects, theories previously viewed as untestable are now scrutinized, efficacy of public policies are now more easily verified, and stakeholders...

Technological progress and trade potentially affect wages and employment. Technological progress can make jobs obsolete and trade can increase unemployment in import competing sectors. Empirical evidence suggests that both causes are important to explain recent labour market developments in many...