Working Paper
Can Machines Understand Analyst Skills?
[Paper]
• Revise & Resubmit, Journal of Finance
We use machine learning to identify skilled financial analysts and aggregate their forecasts into a crowd wisdom-based earnings prediction. Machine-selected analysts persistently outperform expert-picked star analysts by leveraging nonlinear interactions of analyst characteristics rather than relation-based information.
Mapping the Midweek Mountain: The New Geography of Hybrid Work
[Paper]
• Minor revision, Humanities and Social Sciences Communications
Using 41 billion mobile geolocation records, we document a lasting post-pandemic shift in work patterns: a 'midweek mountain' of office attendance on Tuesdays through Thursdays, with workers spending significantly more time at non-work locations during the workday.
The Impact of AI Adoption on Hedge Fund Performance
[Paper]
• Under submission
We examine how AI adoption affects hedge fund performance and find that it improves returns by 2.64% annually, reduces risk, and leads to more diversified portfolios with less concentration in local stocks.
Machines in the Marketplace of Ideas: Automation and Rent Concentration in Prediction Markets
Using Polymarket's full trade record of 532 million trades over 40 months, we show that machine-paced trading concentrates where prices can be transported from external betting lines, that its efficiency is real but borrowed, and that its profits concentrate in a handful of operators while the non-machine side pays a zero-sum $137.5 million.
Who Gains the Most from AI Accessibility? Evidence from Retail and Institutional Trades
We ask whether the arrival of generative AI narrows or widens the informational gap between retail and institutional investors, comparing trading behavior on both sides of the market around the diffusion of AI tools.
The Vulnerability Trap: How Sudden Stops Erode Firm Financial Health Through Supply Chain Destruction
• Under submission
We show that sudden stops in international capital flows destroy firms' supply chain networks, creating a vulnerability trap: financially fragile firms suffer the most network damage, which further weakens their financial health and amplifies exposure to future crises.
Why do actively managed mutual funds hold ETFs? Evidence on liquidity management
This paper examines why actively managed mutual funds hold ETFs and finds they serve as a liquidity management tool. Funds using index ETFs maintain performance regardless of investor flow, while non-users suffer lower returns during redemptions.