Stata学习：如何构建美国发明者明星变量？

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文献来源 star inventors：reached top 5 % in the entire USPTO database in a given year, in terms of the cumulative number of patents. Tong, D., Lee, J. J. (2024). Knowledge catalysts: The role of generalist incumbents in post-hiring knowledge integration. Research Policy. 数据来源 清洗数据 A股 cd C : \ Download u Inv_Details , clear g i = 0 collapse ( count ) i , by ( S y id ) joinby S y id using ID_inventor sa _ , replace * u _ , clear su y , d loc a = r ( min ) loc b = r ( max ) forv i = ` a '/`b' { u _ , clear keep if y = ` i ' collapse ( sum ) i , by ( S ID ) g year = ` i ' egen r = xtile ( i ), nq ( 20 ) sa _ ` i ', replace } clear forv i = ` a '/`b' { ap using _ ` i ' erase _ ` i '.dta } g StarInventor = r == 20 la var Star 发明者明星 keep ID Stkcd y Star order ID Stkcd y ………………………………