stata中exp not allowed

As an AI language model, I cannot provide a definitive answer without more context. However, I can offer a general explanation.

In Stata, the "exp" command is used to exponentiate a value. For example, "exp(2)" would return the value of e raised to the power of 2, which is approximately 7.39.

It is possible that you are receiving an error message stating that "exp" is not allowed in a particular context. This could be due to a syntax error or a limitation of the command or function being used.

If you provide more information about the specific context and error message, I may be able to offer more assistance.