This paper estimates the elasticity of substitution between capital and skill using variation across U.S. counties in immigration-induced skill mix changes between 1860 and 1930. We find that capital began as a q-complement for skilled and unskilled workers, and then dramatically increased its...

This paper focuses on the bi-directional interaction between technology adoption and labor market conditions. We examine cross-city differences in PC adoption, relative wages, and changes in relative wages over the period 1980-2000 to evaluate whether the patterns conform to the predictions of a...

This paper estimates returns to scale for manufacturing industries around the turn of the twentieth century in the United States by exploiting an industry-city panel data for the years 1880-1930. We estimate decreasing returns to scale on average over the period, contrary to most of the existing...

Research on the labor market impact of immigration typically relies on a single-good model of production with separable capital. This article discusses theory and evidence that suggest that this standard model is too simple to capture the long-run labor market impact of immigration. A level of...

This paper focuses on the bi-directional interaction between technology adoption and labor market conditions. We examine cross-city differences in PC-adoption, relative wages, and changes in relative wages over the period 1980-2000 to evaluate whether the patterns conform to the predictions of a...

Is the Armed Forces Qualifying Test (AFQT) a measure of achievement or ability? The answer to this question is critical for drawing inferences from studies in which it is employed. In this paper, we test for a relationship between schooling and AFQT performance in the NLSY 79 by comparing...

We examine how the large, one-time legalization authorized by the Immigration Reform and Control Act (IRCA) has affected the scale and character of immigration to the U.S. since the late 1980s. Exploiting cross-country variation in the magnitude of the legalization shock, we find that each IRCA...

We use city-industry data from 1890 to 1940 to identify the impact of electricity on manufacturing. We exploit cross-industry variation in pre-electricity energy intensity combined with geographic variation in proximity to early hydroelectric power plants. Labor productivity gains from the...

Mexican immigrants were historically clustered in a few cities, mainly in California and Texas. During the past 15 years, however, arrivals from Mexico established sizeable immigrant communities in many "new" cities. We explore the causes and consequences of the widening geographic diffusion of...

Is the Armed Forces Qualifying Test (AFQT) a measure of achievement or ability? The answer to this question is critical for drawing inferences from studies in which it is employed. In this paper, we test for a relationship between schooling and AFQT performance in the NLSY 79 by comparing...