Dear all,
I am trying to use the BOOTTEST command after estimating a gravity model using PPMLHDFE. I receive the following r(198) error message:
"option constraints not allowed
Error imposing null. Perhaps ppmlhdfe does not accept the constraints(), from(), and iterate() options, as needed."
The same message appears in the following data example:
sysuse auto, clear
ppmlhdfe price weight length, a(turn foreign)
boottest weight
I am using an updated version of Stata 15.1 and I have the last versions of FTOOLS and REGHDFE installed.
Thank you in advance for your valuable help
I am trying to use the BOOTTEST command after estimating a gravity model using PPMLHDFE. I receive the following r(198) error message:
"option constraints not allowed
Error imposing null. Perhaps ppmlhdfe does not accept the constraints(), from(), and iterate() options, as needed."
The same message appears in the following data example:
sysuse auto, clear
ppmlhdfe price weight length, a(turn foreign)
boottest weight
I am using an updated version of Stata 15.1 and I have the last versions of FTOOLS and REGHDFE installed.
Thank you in advance for your valuable help
Comment