In recent years, Spain has received unprecedented immigration flows. Between 2001 and 2006 the fraction of the population born abroad more than doubled, increasing from 4.8% to 10.8%. For Spanish provinces with above-median inflows (relative to population), immigration increased the high school...

Ecuador experienced an unprecedented wave of international migration since the late 1990s, triggered by a severe economic and financial crisis. This paper gathers individual-level data from Ecuador and the two main destinations of Ecuadorian migrants: the US and Spain. First, we provide a...

Many U.S. businessmen are vocally in favor of an increase in the number of H-1B visas. Is there systematic evidence that this would positively affect firms' productivity, sales, employment or profits? To address these questions we assemble a unique dataset that matches all labor condition...