Fiscal decentralization has become a central theme in the academic field as well as for international aid programs. Current studies of fiscal decentralization center on its economic benefits. However, the possibility that fiscal decentralization facilitates economic performance through enhanced public governance largely is ignored. This essay attempts to examine the possible associations among fiscal decentralization, public governance, and economic performance. Different from traditional statistical techniques such as regression analysis, this research employs a novel analytical approach (i.e., partial least square-structural equation modeling, or PLS-SEM) to explore these associations. We established two PLS-SEM models, the Oates Model and the Superior Goods Model, to test our hypotheses. Our empirical results suggest that the Oates argument and the Superior Goods contentions are both valid in our models. These outcomes also imply that, to reap ultimate economic benefits, fiscal decentralization should be implemented along with proper institutional reforms for better public governance.