Hello, my name is Jiayin Zhai and I am a Ph.D. candidate in the Department of Economics at the University of California, Los Angeles. I am on the job market for 2025-26.
My research interests are in microeconomic theory, particularly in information design, social learning and industry organization.
Download my CV here. You can reach me at ✉️ jiayinz06@ucla.edu.
The Optimal Level of Consultation (Job Market Paper) [full draft]
Abstract: We study how an information provider optimally manages information precision to maximize revenue from a consumer who pays to learn before taking an irreversible action. The principal chooses the precision of a drift-diffusion signal process, and the agent decides when to stop learning and take an action. We find that the principal optimally provides the least informative signals to the most uncertain agent because the principal can exploit the agent's high willingness to pay for information to prolong engagement and extract rents. This generates a U-shaped relationship between optimal precision and the agent’s prior belief. When the agent's prior is his private information, standard screening breaks down, and any menu of contracts collapses to a single pooling contract, limiting the principal's ability to differentiate across types and excluding agents with sufficiently extreme priors. Applications include digital search platforms and advisory markets.
Experimentation with Asymmetric Observation
Evolving Social Norms on Networks
Course Instructor
ECON 101: Microeconomic Theory - 2024 Summer (Rating: 8.25/9.00)
Teaching Assistant
ECON 201B: 1st-year Ph.D. Game Theory
2022 Winter (9.00/9.00)
ECON 106I: Organizational Economics
2024 Fall(8.40/9.00); 2024 Winter (8.25/9.00)
ECON 106G: Introduction to Game Theory
2024 Spring
ECON 101: Microeconomic Theory
2022 Fall(8.30/9.00); 2022 Winter (8.77/9.00)
ECON 103: Introduction to Econometrics
2022 Summer(9.00/9.00); 2023 Fall (8.40/9.00); 2025 Winter(8.00/9.00); 2025 Spring (8.50/9.00); 2025 Summer(8.43/9.00)
ECON 41: Probability and Statistics
2021 Spring(8.40/9.00); 2021 Fall (8.25/9.00); 2022 Spring(8.40/9.00)