Zombie firms, state subsidies and aggregate productivity

Xijie Gao

Economica, 2025, vol. 92, issue 366, 507-547

Abstract: Using firm‐level data from the manufacturing sector in China, I document that zombie firms are larger and less productive, and receive higher subsidy rates on average. The difference in subsidy rates between zombies and non‐zombies reflects both the selection criteria of zombies and the underlying joint distribution of subsidy rate and productivity. I develop a model with heterogeneous firms to quantify the impact of zombies on aggregate productivity. Quantitative exercises show that while both policies—reducing subsidy dispersion and facilitating zombie exits—effectively reduce the zombie rate, the former yields greater productivity gains.

Date: 2025
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