关键词: 乡村振兴, 低收入群体增收, 地区异质性, 财政资金, 合成控制法

Abstract: Promoting sustainable income growth of lowincome groups is the economic foundation for rural revitalization The “complete victory” in poverty alleviation shows that fiscal funds have played a huge role in ensuring income growth for lowincome groups However， the targeted fiscal funds， such as special poverty alleviation funds from the central government， is temporary， and will change with the economic and social development of different regions The income growth heterogeneity after the reduction in financial support provides new evidence for sustainable development of lowincome groups
This study uses synthetic control method to evaluate the regional heterogeneity of rural income growth after the reduction of financial support based on countylevel panel dataset from 2006 to 2019， and further explores the reason of this regional heterogeneity The main findings of this study are as follows： First， the observed 31 counties can be divides into three types according to income growth of lowincome groups， including the rising type （about 3548%）， the declining type （about 4516%）， and the invariant type （about 1936%） Second， the reduction in financial support increases fiscal expenditure pressure of local governments Underdeveloped areas rely heavily on financial support from higherlevel governments， and local governments still have significant expenditure demands for linking up rural revitalization Third， the decreased fiscal income and increased expenditure pressure lead to an overall reduction in fiscal expenditure， which has heterogeneous effects on different types of regions On the one hand， it results in suppressing effects， where regions with relatively strong selfdevelopment capabilities still show an accelerating growth trend， albeit at a reduced rate On the other hand， it leads to restraining effects， where regions with relatively weak selfdevelopment capabilities show slowed income growth Fourth， Continuous optimization of industrial structure and infrastructure construction plays a positive role in improving selfdevelopment capabilities However， the positive effect of financial loans has not been fully released due to financial power exclusion， and low financial capacity， etc
Based on the above findings， this study proposes the following policy recommendations： First， we should tailor and implement support， guarantee， and incentive policies according to local conditions Second， we should make full use of incentive and constraint mechanisms to encourage local governments to strengthen their own financial resources construction， such as linking financial support with the growth of the local governments own financial capacity Third， we should leverage the positive role of fiscal funds in promoting the inflow of production factors into underdeveloped areas， such as highskilled labors， market capitals， hightech technologies， etc， to fundamentally enhance the selfdevelopment capabilities of the underdeveloped areas and lowincome groups

Key words: rural revitalization, income growth of the low-income groups, reginal heterogeneity, financial support, synthetic control method