A Bridge on Economic Issues between China and the World
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Feedback Trading and the Chinese Put Warrants Bubble
Neil D. Pearson, Zhishu Yang, Qi Zhang, Jul 27, 2022There was a bubble in the prices of put warrants traded on the Shanghai and Shenzhen stock exchanges during the summer of 2007. We use investor trading records from a large securities firm to show that put warrant investors engaged in a particular form of feedback trading. This feedback trading exacerbated an initial run-up in put warrant prices caused by a change in the stock transaction tax, and created the bubble.
Monetary Policy in China: A Trade-Off Between Transmission and Stability?
Kaiji Chen, Yiqing Xiao, Tao Zha, Sep 24, 2025We explore how China’s shift toward interest-rate-based monetary policy faces an inherent trade-off. When non-state banks turn to wholesale funding, monetary policy easing is transmitted more effectively to productive firms, but the banking system also becomes more fragile in economic downturns. Our findings suggest that China’s regulators must strike a careful balance between achieving policy effectiveness and safeguarding financial stability.
Drive Down the Cost: Learning by Doing and Government Policies in the Global EV Battery Industry
Panle Jia Barwick, Hyuk-soo Kwon, Shanjun Li, Nahim Bin Zahur, Apr 16, 2025Electric vehicle (EV) battery costs have fallen over 90% in the last decade. This study examines how learning-by-doing (LBD) drives this decline and interacts with government policies such as consumer EV subsidies and local content requirements. Leveraging rich data on EV models and battery suppliers from 13 countries with largest EV sales that account for 95% of global EV sales, we develop a structural model of the EV industry that incorporates consumer choices and pricing strategies by EV producers and battery suppliers....
The Effect of Pollution and Heat on the Productivity of High-Skill Public Sector Workers in China
Matthew E. Kahn, Pei Li, May 22, 2019The quality of governance depends on public sector worker productivity. We use micro data from China to document that judges are less productive on polluted days. We find that public sector productivity elasticities are larger than the published estimates of private sector productivity elasticities with respect to pollution.
The Price of Growing Like China: Higher Income Risks and Less Consumption Insurance
Raül Santaeulàlia-Llopis, Yu Zheng, Jun 20, 2018Widening income inequality in China has prompted President Xi Jinping to shift focus and to emphasize the fostering of balanced, high-quality development. But how exactly did income inequality evolve over China’s growth process and what was its impact on consumption and welfare? Using a long panel of income and consumption data from thousands of rural and urban households, we document that the increasing income inequality in China mainly reflects increasing permanent income risk, against which it became harder and harder to insure consumption, over the period of rapid income growth from 1989 to 2009. In other words, as household income grew, so did income fluctuations. These income fluctuations had an increasingly direct impact on consumption. For rural households, the welfare cost from increasing income risk and increasing exposure of consumption to income risk can almost cancel out the welfare gain from accelerated income growth over those twenty years.
