Dear stata users,

For my thesis, I make use of the XTABOND2 command.
My command is the following:
Array

My variable of interest is Accreceivable. I tried to incorporate a dummy NACE2D (an industry dummy) as follows:
Array

This generates the following output for the tests:


Array
Could someone tell me why the Sargan and Hansen test have no p-value? This was not the case with the output of the first command above.

Kind regards