Due in large part to intense takeover activity during the 1980s, the extent of American firms' industrial diversification declined significantly during the second half of the decade. The mean number of industries in which firms operated declined 14 percent, and the fraction of single-industry...

I examine the effect of pharmaceutical innovation on the functional status of nursing home residents using cross-sectional, patient-level data from the 2004 National Nursing Home Survey. This was the first public-use survey of nursing homes that contains detailed information about medication...

We reassess the effect of state and federal minimum wages on U.S. earnings inequality using two additional decades of data and far greater variation in minimum wages than was available to earlier studies. We argue that prior literature suffers from two sources of bias and propose an IV strategy...

Two ailments limit the effectiveness and threaten the long-term viability of the U.S. Social Security Disability Insurance program (SSDI). First, the program is ineffective in assisting the vast majority of workers with less severe disabilities to reach their employment potential or earn their...

We analyze the effect of rising Chinese import competition between 1990 and 2007 on local U.S. labor markets, exploiting cross-market variation in import exposure stemming from initial differences in industry specialization while instrumenting for imports using changes in Chinese imports by...

This paper explores the geographic overlap of trade and technology shocks across local labor markets in the United States. Regional exposure to technological change, as measured by specialization in routine task-intensive production and clerical occupations, is largely uncorrelated with regional...

Previous investigators argued that increasing 5-year survival for cancer patients should not be taken as evidence of improved prevention, screening, or therapy, because they found little correlation between the change in 5-year survival for a specific tumor and the change in tumor-related...

We offer an integrated explanation and empirical analysis of the polarization of U.S. employment and wages between 1980 and 2005, and the concurrent growth of low skill service occupations. We attribute polarization to the interaction between consumer preferences, which favor variety over...

We use data from PubMed and other sources to examine the impact of public and private research support on premature (before ages 75, 65, and 55) cancer mortality and hospitalization, by estimating difference-in-differences models based on longitudinal, cancer-site-level data on about 30 cancer...

Although the official statistics imply that the rate of growth of real GDP in the United States has declined in recent years, it has still been substantially higher than the real growth rates in Europe and the other industrial countries, leading to higher real per capita incomes. This paper...