Data and Code for: The Size Distribution of Firms and Industrial Water Pollution: A Quantitative Analysis of China

We argue that misallocation across firms amplifies industrial water pollution by distorting the firm size distribution in China. Firm-level data indicate that larger firms are more likely to use clean technology but face higher distortions. In a heterogeneous firms model with an endogenous choice of pollution treatment technologies, we show that distortions that increase with firm-level TFP lower the adoption of clean technology, amplify aggregate pollution intensity, and lower aggregate output. Quantitatively, eliminating these correlated distortions would increase output by 30% and decrease pollution by 20%. Meanwhile, environmental regulations have sizable impact on pollution but limited effects on aggregate output.