Hi guys, I have panel data with 2Ts and 498N. I need to test the overall significance of my fixed effects model. My classmates use the wald test xttest3 but i'm not sure how to interpret this. The results are as follows
chi2 (498) = 0.00
prob >chi2 =1.000


I'm not sure what this means in terms of overall significance and also whether it is even a valid tester considering I only have 2Ts.
Does anyone have any advice on how to test overall model significance given the my short panel data.
Thank you