1、首先使用不同的命令。2、其次optionnotallowed解决，使用不同的参数、不同的数据集。3、最后使用不同的Stata版本。
Please could you give me some pointers on how to get this command to work? I haven't been able to find information on how to deal with this elsewhere. If not, is anyone aware of an alternative method that I could try, please? Are you running at least version 1.81 of -metan-? (The...