自己摸索出来了!谢谢大家!打扰了!
差不多是这样
***** (i) *****
** AR(1) for linvpc
corr linvpc l.linvpc
** detrend linvpc
regress linvpc year
predict linvpc_detrend, resid
** find AR(1)
corr linvpc_detrend l.linvpc_detrend
** AR(1) for lprice
corr lprice l.lprice
** detrend linvpc
regress lprice year
predict lprice_detrend, resid
** find AR(1)
corr lprice_detrend l.lprice_detrend
***** (ii) *****
regress linvpc d.lprice t
***** (iii) *****
** use linvpc_detrend as dependent variable
regress linvpc_detrend d.lprice t
** R-squared=0.3026
***** (iv) *****
** use d.linvpc as dependent variable
regress d.linvpc d.lprice t


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