tsset t(for time series)

tsset id t (for panel data)

gen dx = D.x /*一阶差分*/

gen d2x = D2.x /*二阶差分*/

滞后算子为 L，使用方法同上。

arlionn 发表于 2007-9-21 09:41
tsset t(for time series)
tsset id t (for panel data)
gen dx = D.x  /*一阶差分*/

arlionn 发表于 2007-9-21 09:41
tsset t(for time series)
tsset id t (for panel data)
gen dx = D.x  /*一阶差分*/

weining2020 发表于 2015-6-30 15:27
想请教个问题，我用stata做一阶差分，gen dx=D.x命令后，出现的dx全部都是缺省值，这是怎么回事儿啊？

weining2020 发表于 2015-6-30 15:27
想请教个问题，我用stata做一阶差分，gen dx=D.x命令后，出现的dx全部都是缺省值，这是怎么回事儿啊？

哈皮朋友 发表于 2012-3-3 17:09
哈哈，学会了怎么生成差分，就自我反思，知道怎么生成差分的交互项。
g dx1x2=dx1*dx2
就可生成x1和 ...

arlionn 发表于 2007-9-21 09:41
tsset t(for time series)
tsset id t (for panel data)
gen dx = D.x  /*一阶差分*/

arlionn 发表于 2007-9-21 09:41
tsset t(for time series)
tsset id t (for panel data)
gen dx = D.x  /*一阶差分*/