Assistant Professor of Marketing

Sun Yat-sen University

Biography

Greetings! I am an assistant professor of marketing at the School of Business, Sun Yat-sen University. I graduated from the University of Arizona with a Ph.D. degree in economics. My research interests include industrial organization, quantitative marketing, digital economy, and Chinese economy. Currently I focus on how apps compete for user time and antitrust issues in the mobile Internet industry. My earlier work on media bias in China is published in China Economic Review.

Interests

  • Industrial Organization
  • Quantitative Marketing
  • Digital Economy
  • Chinese Economy

Education

  • PhD in Economics, 2016-2021

    The University of Arizona

  • MPhil in Economics, 2014-2016

    The Chinese University of Hong Kong

  • BSc in Economics, 2010-2014

    Zhejiang University

Job Market Paper

Competing for Time: A Study of Mobile Applications

A smartphone user allocates her time among multiple mobile applications. To study the competitive relationship between apps, I develop a discrete-continuous model of time allocation with a binding time constraint; its parameters are estimated using a weekly panel of app usage in China. If two apps are often used together, it is because either they are complements or the preferences of the two apps are positively correlated. To disentangle complementarity (substitutability) from correlation in preferences, I use the exclusion restriction wherein updates of an app should affect the utility of that app but not those of other apps. I estimate the model on three representative pairs of apps (a priori substitutes, complements, and independent apps). In each case, I recover a reasonable competition pattern. Morever, I simulate counter-factuals in which one of the two apps is shut down and decompose the effects into two parts: functional competition and budget competition (the latter of which captures the effects of a binding time constraint). With an assumption about the monetary value of time, I simulate mergers of the three pairs of apps. I find that a merger of seemingly independent apps can hurt consumers because the two apps are competing for user time. My results confirm that users and firms can both benefit from a merger of complements. I also find that usage-based pricing leads to higher profits and total surplus compared to subscription pricing, because it enables price discrimination based on usage on the part of companies.

Research

Editorial Recommendations and Product Discovery: Evidence from Apple App Store

Policy-Driven Innovation: The Case of China

Power and Anti-Corruption inside Standing Committees

Measuring media bias in China

Skills

python

Python

cpp

C/C++

R

matlab

Matlab

stata

Stata

Contact