请问，分年度回归后(eg.logit)，想列示平均的系数以及平均z统计量，stata是否有命令可以实现。

找到一段英文是这样描述的：Table 4 reports the estimates of Eq 4 aggregated over the years. The firstcolumn presents the averages of the annual coefficient estimates, and thesecond column presents an aggregate z-statistic, calculated as the sum ofindividual annual z-statistics divided by the square root of the number ofyears.

按照这个步骤可以一步步算出来，想问下stata有没有简单的命令，可以直接求出来的。谢谢