定义面板数据时,出现repeated time values within panel 是怎么回事,如何解决?
tsset tfp year
repeated time values within panel
方法:
duplicates drop tfp year, force tsset tfp year |
定义面板数据时,出现repeated time values within panel 是怎么回事,如何解决?
tsset tfp year
repeated time values within panel
方法:
duplicates drop tfp year, force tsset tfp year |
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