How to compute Anderson-Rubin p-values to test for weak instrument problem?

[Alex Buchelli]

I am running a fixed-effects IV regression and wish to compute the Anderson-Rubin p-values to determine whether my instruments are weak. I am using the xtivreg2 command in Stata (but have tried to use ivreg2, xtivreg); however, it appears to not work with the "ar" command. Can anyone suggest how else I may compute the Anderson-Rubin p-values?

[Alex Buchelli]

Use weakiv command after regression