How much to share: Welfare effects of fiscal transfers
研究跨国财政转移的最优程度，发现长期能改善福利，但短期过渡性损失可能超过长期收益，对设计跨国财政转移有参考价值。
Abstract Recent sovereign debt crisis has challenged policy makers to explore the possibility of establishing a fiscal transfer system that could alleviate the negative impact of asymmetric shocks across countries. Using a simple labour production economy, we first derive an analytically tractable solution for optimal degree of fiscal transfers. In this economy, fiscal transfers can improve welfare by moving the competitive equilibrium with fiscal transfers closer to the social planner's solution. We then extend the model to a DSGE setting with capital, international bond and linear taxes, and we analyze how implementation of a simple revenue sharing rule affects welfare and macroeconomic variables over time. Simulation results show that risk sharing through fiscal transfers always improves welfare in the long run. However, under certain model specifications, short‐run transitional welfare loss can outweigh the long‐run benefits. These results suggest that, in designing fiscal transfers across countries, government should take into consideration the intertemporal nature of welfare gains.