Sijie Wang (Still) 王思杰

Ph.D. student in Applied Economics, Beijing Jiaotong University, Beijing, China. I also go by Still.

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About

I am a doctoral student in Applied Economics at the School of Economics and Management, Beijing Jiaotong University, advised by Zhigang Cao . My current research focuses on game theory and network games, especially equilibrium existence, uniqueness, and stability.

Education

2023-present. Ph.D. in Applied Economics, School of Economics and Management, Beijing Jiaotong University.
2021-2023. M.A. student in Applied Economics, School of Economics and Management, Beijing Jiaotong University; continued into the Ph.D. program after the second year.
2015-2019. B.A. in Advertising, School of Journalism and Communication, Jilin University.

Research Interests

Game theory and network games
Equilibrium existence, uniqueness, and stability
General equilibrium theory

Publications

Unless otherwise indicated, coauthors are listed alphabetically, following the convention in economic theory.

On Scarcity in Glove Games. (with Doudou Gong and Zhengxing Zou) Economics Letters, 265, Article 113030, 2026. DOI
Pricing Negative Externalities in Social Networks. (with Guopeng Li, Yifan Xiong, and Feng Zhu) Journal of Mathematical Economics, 118(C), Article 103105, 2025. DOI

Working Papers

Network Games with Higher-Order Interactions. (with Zhigang Cao and Guopeng Li) Working paper, 2026. SSRN
A Katz–Bonacich Envelope for Network Games with Large Spillovers. (with Zhigang Cao and Feng Zhu) Working paper, 2026. SSRN
(Strategic) Elasticity. (with Zhigang Cao and Feng Zhu) Working paper, 2026. SSRN

Work in Progress

A Comment on: “Connected Substitutes and Invertibility of Demand”. (with Ertan Zhuang)
Hilbert Elasticity. (with Zhigang Cao)
A Comment on “Pricing in Social Networks”. (with Zhigang Cao)
Uniqueness in Network Games with Linear Strategic Complementarities. (with Zhigang Cao)

“When a scholar publishes a paper, it is a letter sent to unknown recipients. If the job has been well done, then with luck it may be found and read, perhaps years later, by people who may take it into their lives and let it change their understanding of the world.”

Roger B. Myerson, Learning Game Theory from John Harsanyi, Games and Economic Behavior, 36(1), 20–25 (2001).

Seminar

I co-organize the Networks and Economic Theory (NET) Seminar with Guopeng Li. The seminar features detailed, tool-oriented presentations of classic, frontier, and working papers on economic networks.