新时代海外经历能带来更高的科研产出吗?OACHSSCD

Based on the data of scientists and technicians in Beijing in 2022,this paper employs Double Machine Learning(DML)and causal mediation analysis to identify the causal effect of overseas experience on research output after stripping away multi-dimensional confounding factors.The results indicate that overseas experience significantly promotes researchers' overall output.Mechanism analysis reveals that academic talent titles play a partial mediating role,with the indirect effect accounting for 32.4％of the total effect.However,overseas experience doesn't enhance research output through international connections or perceived ability.Furthermore,the impact of overseas experience exhibits significant heterogeneity:in terms of mobility patterns,the cross-national flow experiences are the core factor driving the growth of scientific research output;Regarding generational characteristics,the premium of overseas experience shows a significant convergence trend;In terms of disciplinary characteristics,overseas experience significantly boosts output in sciences and engineering;in contrast,agricultural and medical sciences,which heavily rely on localized resources,show marginal gains,with medicine even facing negative effects.Based on these findings,this study suggests improving the mechanisms for the introduction,cultivation,and international exchange of researchers.It recommends establishing a dual evaluation standard of"overseas experience+actual capability"to optimize a diversified research evaluation system,formulating precise talent support policies categorized by disciplines and age groups,and further enhancing the scale and quality of domestic independent talent cultivation.