I am using suest to compare the results of Non linear regressions,
use NLS_min1, clear
keep if US==0
nl (LN_Q = {b0} + ln(1+ {A}*A1_min1+ {B}*B_min1)+{b1}*FirmID+{y1}*year_dummy1+{y2}*year_dummy2), variables(LN_Q A_min1 B_min1 FirmID year_dummy1 year_dummy2)
est store model1
use NLS_min1, clear
keep if US==1
nl (LN_Q = {b0} + ln(1+ {A}A1_min1+ {B}B_min1)+{b1}FirmID+{y1}year_dummy1+{y2}*year_dummy2), variables(LN_Q A_min1 B_min1 FirmID year_dummy1 year_dummy2)
est store model2
suest model1 model2, vce(cluster FirmID)
testnl [model1_mean = model2_mean]: LN_Q
However, I am getting the following error instead of results:
suest model1 model2, vce(cluster FirmID)
estimation sample of the model saved under model1 could not be restored
I have searched many web pages, but I have not been able to solve this problem Could you please give me some advice? Many thanks in advance.
