Wall Street and the Housing Bubble (with Ing-Haw Cheng and Wei Xiong), American Economic Review, 2014, 104(9), pp. 2797-2829.

We analyze whether midlevel managers in securitized finance were aware of a large-scale housing bubble and a looming crisis in 2004-2006 using their personal home transaction data. We find that the average person in our sample neither timed the market nor were cautious in their home transactions, and did not exhibit awareness of problems in overall housing markets. Certain groups of securitization agents were particularly aggressive in increasing their exposure to housing during this period, suggesting the need to expand the incentives-based view of the crisis to incorporate a role for beliefs.

Supplementary materials: online appendix, data

Related coverage: voxeu, Econbrowser (Hamilton), FT, WSJ, TheStreet

Ultimate Ownership and Bank Competition (with José Azar and Martin Schmalz), Financial Management, 2021, pp. 1-43.

We document substantial time-series and cross-sectional variation in branch-level deposit account interest rates, maintenance fees, and fee thresholds, and examine whether variation in bank concentration helps explain variation in these prices. HHI alone is not correlated with any of the outcome variables. A “generalized HHI” (GHHI) capturing both common ownership (the degree to which banks are commonly owned by the same investors) and cross-ownership (the extent to which banks own shares in each other), is strongly correlated with all prices, even when we limit cross-sectional variation in bank ownership to only that predicted by the growth of index funds.

Related coverage: The Economist, Slate, New Yorker, New York Times

Working Papers

The Effect of Competition in Upstream and Downstream Industries on Firm Boundaries (with Kuncheng Zheng), October 2021.

How does competition in upstream and downstream industries affect firm boundaries? We use instrumented Chinese import penetration into up- and downstream industries to study this question. We find that greater competition in up- and downstream indus- tries causes firms’ boundaries with vertically linked industries to contract, as predicted by double-marginalization. Further, we find firms diversify into non-vertically linked industries when up- or downstream competition threatens their survival, consistent with the “growing out of trouble” hypothesis. Our research highlights the importance of trading partners’ competition for firms’ choice of scope and boundaries and has implications for antitrust and international trade regulations.

Partisan Gerrymandering, Congressional Polarization, and Distributive Politics (with Sheng-Jun Xu), June 2021.

Prior attempts to link gerrymandering to incumbency advantage and political polar- ization overlook an important strategic nuance: a partisan gerrymanderer has an in- terest in “attacking” vulnerable incumbents of the opposing party while “protecting” vulnerable incumbents from its own party. Tracking incumbents in the U.S. House of Representatives before and after redistricting, we show that a narrow loss for the gerrymandering party’s candidate in the pre-redistricting election predicts greater in- cumbent vulnerability in the post-redistricting election relative to a narrow win for the gerrymandering party’s candidate. We develop a simple model to show that elected politicians who lose partisan support will compensate by changing their optimal mix of partisan positioning and individual effort. We test the model’s predictions using the discontinuity in incumbency advantage predicted by partisan gerrymandering, and find that incumbents weakened by gerrymandering are indeed less partisan in their congressional voting behavior and bring more discretionary federal spending to their districts.

VCs, Founders, and the Performance Gender Gap, January 2021.

VC-financed startups founded by women perform worse than startups founded exclu- sively by men. Do VCs influence this performance gap? To answer this question, I compare the gender gap in performance between startups initially financed by syn- dicates led by VCs with only male general partners (GPs) and startups financed by syndicates led by VCs with female GPs. I find a much larger performance gap among startups financed by syndicates with only male lead GPs. I show this disparity is driven by differences in VCs’ ability to evaluate female-led startups. These findings imply that VCs contributed to the performance gender gap in startups.

SSRN Abstract 2846047

Related coverage: HBR, Globe and Mail, Tuck Forum on PE and VC Reuters Business, Reuters Business

Works in Progress

CEO Communication and Collusion (with Ran Duchin and Kuncheng Zheng).

We study whether private communication among industry CEOs fosters collusion using unexpected health-related CEO departures to disrupt private inter-CEO communication.

Misreporting in Debt Renegotiation: A Bunching Analysis (with Slava Mikhed, Barry Scholnick, and Mandy Zhang).

We employ a novel bunching-based empirical methodology to study the effects of debtor misreporting in debt renegotiations.