用stata进行回归分析时候,为了消除异方差和序列相关的影响我使用了xtscc命令,但是操作结果却没法运行,希望大神能告诉我解决办法,我的命令:
tsset id time
panel variable: id (unbalanced)
time variable: time, 20041231 to 20180930, but with gaps
delta: 1 unit
xtscc risk gdp cpi roa
然后出现红字结果(time is not regularly spaced: there are contemporaneous gap(s) across all subjects in id)我的数据实非平衡面板数据。 不知道该怎么解决?