st: Using suest after mfx2 or margeff - error r(322)

[pascalstock@freenet.de]

Hello STATA users,

I try to use the suest command after estimating two different sets of marginal effects at the mean with mfx2 or margeff from two different probit regressions. I intend to compare the differences between the marginal effects betwenn the two probit regressions whether they differ significantly with Wald tests. For this I first want to use suest to have one set of marginal effects from both probit regressions. Unfortunately the stored marginal effects, as if mfx2 or margeff were estimation commands, provide the following error message 


.  suest unadvised non_bulge_bracket
unable to generate scores for model unadvised
suest requires that predict allow the score option
r(322);

"unadvised" and "non_bulge_bracket" are the names I gave to the stored marginal effects:

probit follow_on_bid industry_experience_deals_A ... if advisory_choice==1
margeff, at(mean) replace
estimates store unadvised

probit follow_on_bid industry_experience_deals_A ... if advisory_choice==2
margeff, at(mean) replace
estimates store non_bulge_bracket

suest unadvised non_bulge_bracket

test [unadvised=non_bulge_bracket], common

test [unadvised]industry_experience_deals_A=[non_bulge_bracket]industry_experience_deals_A
. ..

With regular probit regression coefficients it works perfectly, but not with the stored marginal effects. Do you have an idea how I can proceed?

Kind regards and thanks for your help

Pascal




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