Since the tax-sharing reform in 1994, the Chinese fiscal system has exhibited a marked vertical fiscal imbalance—a mismatch between expenditure and revenue assignments—at the local levels, which may cause the common-pool problem in local governments' behavior. Using a large fiscal dataset at the county level from 1997 to 2006, this paper studies the effects of fiscal decentralization on local expenditure policy and analyzes how the vertical fiscal imbalance shapes these effects. The estimation r