James J. Choi

• [2025 JFE] 最优的「锁」：一笔退休金，应该有多难取出来？Optimal IlliquidityJun 2026
• [2002 JFE] 把炒股的「超市」搬到家门口：交易翻了一倍，钱却没多赚一分How Does the Internet Affect Trading? Evidence from Investor Behavior in 401(k) PlansJun 2026