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Journal Article
Why Are Life-Cycle Earnings Profiles Getting Flatter?
The authors present a simple, two-period model of human capital accumulation on the job and through college attainment. They use a calibrated version of the model to explain the observed flattening of the life-cycle earnings profiles of two cohorts of workers. The model accounts for more than 55 percent of the observed flattening for high school-educated and for college-educated workers. Two channels generate the flattening in the model: selection (or higher college attainment) and a higher skill price for the more recent cohort. Absent selection, the model would have accounted for no ...
Journal Article
World Population: What Helps Explain the Explosion?
A steep decline in India’s death rate from 1950 to 2019 substantially affected the size of the global population and reduced that nation’s median age relative to the U.S.
Journal Article
The Lost Weeks of COVID-19 Testing in the United States: Part I
The weeks lost due to inaction in the U.S. during the early stages of the COVID-19 pandemic resulted in rationing of tests and a large number of confirmed cases.
Working Paper
Majority Voting in a Model of Means Testing
We study a model of endogenous means testing where households differ in their income and where the in-kind transfer received by each household declines with income. Majority voting determines the two dimensions of public policy: the size of the welfare program and the means-testing rate. We establish the existence of a sequential majority voting equilibrium and show that the means-testing rate increases with the size of the program but the fraction and the identity of the households receiving the transfers are independent of the program size. Furthermore, the set of subsidy recipients does ...
Journal Article
Accounting for Discouraged Workers in the Unemployment Rate
We construct a new measure of the unemployment rate based on a plausible assumption that some, but not all, of the discouraged workers reenter the labor force.
How the Big Mac Index Relates to Overall Consumer Inflation
Big Mac inflation appears to track CPI inflation, but its path can diverge from overall U.S. inflation because of price deviations relative to other items in the consumer basket.
Working Paper
TFP, Capital Deepening, and Gains from trade
We study welfare gains from trade in a dynamic, multicountry model with capital accumulation. We compute the exact transition paths for 93 countries following a permanent, uniform, unanticipated trade liberalization. We find that while the dynamic gains are different across countries, consumption transition paths look similar except for scale. In addition, dynamic gains accrue gradually and are about 60 percent of steady-state gains for every country. Finally, the contribution of capital accumulation to dynamic gains is four times that of TFP.
Working Paper
Explaining Cross-Cohort Differences in Life Cycle Earnings
College-educated workers entering the labor market in 1940 experienced a 4-fold increase in their labor earnings between the ages of 25 and 55; in contrast, the increase was 2.6-fold for those entering the market in 1980. For workers without a college education these figures are 3.6-fold and 1.5-fold, respectively. Why are earnings profiles flatter for recent cohorts? We build a parsimonious model of schooling and human capital accumulation on the job and calibrate it to earnings statistics of workers from the 1940 cohort. The model accounts for 99 percent of the flattening of earnings ...
Journal Article
Who’s Driving a Recent Decline in Life Expectancy?
Life expectancy in the U.S. and most other G-7 nations declined from 2019 to 2021. For the U.S., it was the biggest two-year drop since the early 1920s.
Working Paper
Private Information and Optimal Infant Industry Protection
We study infant industry protection using a dynamic model in which the industry's cost is initially higher than that of foreign competitors. The industry can stochastically lower its cost via learning by doing. Whether the industry has transitioned to low cost is private information. We use a mechanism-design approach to induce the industry to reveal its true cost. We show that (i) the optimal protection, measured by infant industry output, declines over time and is less than that under public information, (ii) the optimal protection policy is time consistent under public information but not ...