coef-methods: Methods for Function 'coef' in Package 'stats'
In gmm4: S4 Generalized Method of Moments

It extract the coefficient estimates of some GMM objects.

signature(object = "gmmfit")
signature(object = "gelfit")
signature(object = "sgmmfit")
signature(object = "gmmModels")
signature(object = "gelModels")
signature(object = "rgelModels")
signature(object = "rlinearGmm"): It gives the unrestricted representation of a restricted model. See examples.
signature(object = "rslinearGmm"): It gives the unrestricted representation of a restricted model.
signature(object = "rfunctionGmm"): It gives the unrestricted representation of a restricted model. See examples.
signature(object = "rformulaGmm"): It gives the unrestricted representation of a restricted model. See examples.
signature(object = "rnonlinearGmm"): It gives the unrestricted representation of a restricted nonlinear model.

data(simData)
model1 <- gmmModel(y~x1+x2+x3+z1, ~x1+x2+z1+z2+z3+z4, data=simData)
res1 <- modelFit(model1)
coef(res1)

### Restricted models
rmodel1 <- restModel(model1, R=c("x1=1", "x2=2*x3"))
res2 <- modelFit(rmodel1)
res2
coef(rmodel1, coef(res2))