Enjie (Jack) Ma

Enjie (Jack) Ma

Assistant Professor of Economics

The Chinese University of Hong Kong, Shenzhen

Welcome!

Hi! I’m Enjie (Jack) Ma (马恩杰), an Assistant Professor of Economics at the School of Management and Economics, The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen). I received my PhD in Economics from Cornell University in 2026.

Interests

  • Environmental Economics
  • Productivity
  • Firm Dynamics
  • Technological Change and Innovation

Education

  • PhD in Economics, 2026

    Cornell University

  • BS in Statistics and BA in Economics, 2016-2020

    University of California, Los Angeles

What's New

  • Jul 2026 — Joined CUHK-Shenzhen as Assistant Professor of Economics
  • Jul 2026 — 🏆 Best Student Paper Award at the 2026 CES China Annual Conference for Climate Change and Market Power
  • Jun 2026 — Misallocation of Climate Innovation accepted for presentation at AERE@ASSA 2027
Research agenda

How climate change reshapes firm productivity, market structure, and the direction of technology

Where environmental economics, industrial organization, and innovation meet: three connected themes, the papers and early-stage work behind them, and where the agenda goes next.

Explore the research agenda

Working Papers

Job Market Paper
Enjie (Jack) Ma
March 2026 Working paper
Extreme Heat and Directed Innovation (JMP)

Extreme Heat and Directed Innovation (JMP)

Can economies innovate their way out of climate trouble? I provide the first systematic evidence outside agriculture that firms adapt to extreme heat through directed technological change. Linking firm-level data with patent records for nine EU countries (2000–2020), I establish …
PDF Slides
Enjie (Jack) Ma, Hui Zhou, Wangyang Lai, Ivan Rudik, Shanjun Li
March 2026 Working paper
Climate Change and Market Power

Climate Change and Market Power

Using manufacturing sector firm-level data from Orbis for 2000–2020, we examine the effects of temperature shocks on industry market power across 12 European countries. Our analysis shows that temperature extremes reduce firm productivity, with significant heterogeneity across …
PDF
Draft coming soon
Enjie (Jack) Ma
February 2026 Working paper
Misallocation of Climate Innovation: Adaptation vs Mitigation

Misallocation of Climate Innovation: Adaptation vs Mitigation

Climate innovation is overwhelmingly directed toward mitigation technologies, yet adaptation—reducing exposure to damages that are already locked in—may be at least as urgently needed. This paper asks whether the current allocation of inventive effort across mitigation and …
Details

Work in Progress

Pricing Carbon in the Automobile Supply Chain

with Valerie Karplus, Ming Li, Shanjun Li, and Chenfei Qu. Who bears the cost of carbon pricing once it propagates through a multi-tier automobile supply chain? Firm-to-firm evidence from the steel-to-auto chain.

🧱 Work in progress

See the full research agenda, including early-stage work

Teaching

CUHK-Shenzhen

Instructor 2026–now
  • ECO 3121 Introductory Econometrics Undergraduate
    Fall 2026
  • ECO 6102 Advanced Econometrics MSc
    Fall 2026

Cornell University

Teaching Assistant 2021–2025
🏆 Ernest Liu Family Outstanding Teaching Award · 2023–2024
  • Econ 1110 Introductory Microeconomics
    Prof. Nicholas Sanders
    Fall 2021 · 4.5/5 Fall 2022 · 4.4/5
  • Econ 1120 Introductory Macroeconomics
    Prof. George Orlov · Prof. Terence Alexander
    Fall 2023 · 4.5/5 Spring 2024 · 4.8/5 Fall 2025
  • Econ 3040 Intermediate Macroeconomics
    Prof. Mathieu Taschereau-Dumouchel
    Spring 2022 · 4.5/5 Spring 2023 · 4.8/5

Talks & Presentations

UPCOMING AERE@ASSA 2027

Climate innovation is overwhelmingly directed toward mitigation technologies, yet adaptation—reducing exposure to damages that are …
Jan 3, 2027 — Jan 5, 2027 Washington, DC
Misallocation of Climate Innovation

CES China Annual Conference 2026

🏆 Awarded the Best Student Paper Award for “Climate Change and Market Power.”
Jul 3, 2026 — Jul 5, 2026 Chengdu, China
Climate Change and Market Power

Northeast Workshop 2026

Presented “Extreme Heat and Directed Innovation” and “Climate Change and Market Power.”
May 8, 2026 — May 9, 2026 Boston College, Boston, MA
Extreme Heat and Directed Innovation Climate Change and Market Power
See all talks

Honors & Service

Honors & Awards

  • Best Student Paper Award
    CES China Annual Conference · for “Climate Change and Market Power”
    2026
  • Conference Travel Grant
    Cornell University
    2025–2026
  • Sage Excellence Fellowship
    Cornell University
    20202025
  • Ernest Liu Family Outstanding Teaching Award
    Cornell University, Department of Economics
    2023–2024

Professional Service

  • Journal Referee
    Journal of Environmental Economics and Management · International Journal of Industrial Organization
  • President, GSAFE
    Graduate Student Association for Students in Economics, Cornell University
    2022–2023

Contact