The Migration Accelerator: Labor Mobility, Housing, and Aggregate Demand (Job Market Paper)
Abstract: Because people choose to move to relatively prosperous regions, economists have traditionally believed that migration mitigates the effects of local shocks. In the first part of this paper, I document that the opposite holds in the data: within-U.S. migration causes a large reduction in the unemployment rate of the receiving city, over several years. To establish the causal effect of inmigration, I construct a plausibly exogenous shock by using the outmigration of other places and predicting its destination based on historical patterns. In the second part of the paper, I document that the increase in the demand for housing explains the boom, through two channels. The construction channel occurs because housing is a durable good: hence there is a surge in the number of new houses and construction jobs. The house price channel occurs because the migrants' housing demand drives up prices, leading to increased borrowing and higher labor demand in non-tradable sectors. Together, these channels account for the size of the labor demand boom. This boom implies that the endogenous response of migration amplifies local labor demand shocks, an effect I label the ``migration accelerator.'' In the final part of the paper, I estimate that migration amplifies these shocks by 20 percent.
Research in Progress
Regional Trend Reversals: Sticky Wages in a Model of Agglomeration
Abstract: States often grow faster or slower than the rest of the country for many consecutive years. I document that changes in these trends, when states move from growing quickly to slowly (or vice versa) relative to the rest of the country, tend to happen near recessions. To show this, I use a procedure from Bry and Boschan (1971) to pinpoint peaks and valleys of the share of U.S. GDP in each U.S. state. I then count the number of peaks and valleys in a given year, and find that this count is highly cyclical. I also find that this effect is more pronounced in professions with greater nominal wage rigidity. To explain this phenomenon, I develop a new mechanism for equilibrium switching during recessions in a core-periphery model using downwardly sticky wages. During a recession, the wage stickiness “destabilizes” the equilibrium, allowing for another equilibrium where firms abandon the core area. During a boom, the wage stickiness is not binding, and so the core remains a stable equilibrium. In a dynamic setting with moving frictions, the economy will abandon the core for sufficiently large shocks. Within the model, place-specific time-specific firm subsidies can be welfare enhancing.
Make Baseball Fun Again (with Vivek Bhattacharya)
Abstract: Using Pitch F/X data covering over 6 million pitches, we document that pitchers are averse to throwing fastballs. Controlling for the state space of a baseball game, including balls, strikes, outs, inning, run differential, and pitcher/batter fixed effects, we find the pitching team is more likely to win the game when throwing a fastball. This is inconsistent with a mixed-strategy equilibrium where the pitcher’s utility is winning the game. We document that fastballs are riskier, leading to more outs, but also to more extra-base hits. We outline a possible incentive problem between the team and the pitcher, who has preferences over remaining in the game, similar to career concerns, leading the pitcher to be risk-averse. As suggestive evidence, we show that these effects are more prevalent later in the game, and that rookie pitchers, who have less leverage over pitch choice, do not exhibit this tendency.
Older Working Paper
Are Recoveries from Banking and Financial Crises Really So Different? (with Rob Martin and Beth Anne Wilson) Federal Reserve Board International Finance Discussion Paper. November 2011.
Generic Maps of the Projective Plane with a Single Triple-Point (with Sue Goodman). Mathematical Proceedings of the Cambridge Philosophical Society. May 2012.