问题一:老师,在进行交乘项之前,还要进行winsorize处理吗?
问题二:老师,我使用interflex来看我能否进行交乘项,但是系统报错了,这是怎么回事儿呢?我的公司--年度值有13390个,是观测值太多了嘛?
. interflex abs_da_mjones multiexp_yearprov_dum abs_err4, type(linear)
too many values
r(134);
error . . . . . . . . . . . . . . . . . . . . . . . . Return code 134
too many values;
1) You attempted to encode a string variable that takes on
more than 65,536 unique values. 2) You attempted to tabulate
a variable or pair of variables that take on too many values.
If you specified two variables, try interchanging them.
3) You issued a graph command using the by option. The
by-variable takes on too many different values to construct
a readable chart.


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