tsset fd yr
panel variable: fd (unbalanced)
time variable: yr, 1998 to 2007, but with gaps
delta: 1 unit
. levpet lny ,free(lnl) proxy(lnm) capital(lnk) revenue
tsset fn2 yr
panel variable: fn2 (unbalanced)
time variable: yr, 1998 to 2007, but with gaps
delta: 1 unit
. levpet lny ,free(lnl) proxy(lnm) capital(lnk) revenue
repeated time values within panel
r(451);
为什么用tsset 后没有显示 repeated time values within panel, 而用levpet命令则显示有repeated time values within panel,并且用duplicates drop fd yr ,force,结果显示没有观测值删除,即并没有重复值, 因而本人对此十分困惑,麻烦各位高手帮帮忙,本人万分感激!!!