产粮大县奖励政策对县域粮食产量的影响研究
——基于2396县域面板数据的实证检验
安徽农业科学 张星 侯立军
关键词产粮大县奖励；多期双重差分；空间双重差分；粮食产量
中图分类号F320.3文献标识码A
文章编号 0517-6611（2026）03-0202-08
doi：10. 3969/j.issn. 0517-6611. 2026.03.038
开放科学（资源服务）标识码（OSID）：
Studyonthe Impact of IncentivePoliciesforMajor Grain-producing Counties on Grain Output—AnEmpirical Test Based onPanel Data of 2 396 Counties
ZHANG Xing，HOULi-jun（1.IstituteofFodandStrategicReserves，Nanjng UniversityofFinance&Ecoomics，Najngng 2.Schol of Business Administration，Nanjing Universityof Finance & Economics，Nanjing，Jiangsu ）
AbstractThrewardfundsalocatedtoajorgran-producingcountishaveebidaconsistentyearon-yeainrease，efltingthecn tralgoveent’oottsgalfdcituatelintivesfteadiss tialforinfoingevidencebadplicyefientDrawingopaeldatafro396coutisspangthpriodo22，issudyployothuipdtesoelsacctfwdl oncounty-levelutputTingsidateateadolcysantlyeasdgainproductioHoeeoio aldieredpacdeste'lsealsstale nalities are observed in counties located within 140-160km of rewarded counties，whereas a siphoning effect emerges in those within 20- （20 （20 40km Whenacountyisadjacenttoarewardedcounty，thepolicygenerallexertsapositiveinfuenceoitsgrainoutput.Incotrast，en acountyissimultaneouslydesigatedasbotharewarddandneighboringcounty，tepolicyoftenexibitsanegatieself-pactThsesults provide empirical support for the development of differentiated subsidy policies.
KeywordsIeforpruoty;liedifedieSpaialdiditput
“民以食为天、国以粮为安”，步人21世纪的第3个10年，粮食安全作为国家安全的基石，其战略地位愈发凸显。（剩余10057字）