Marginal generalized linear models for correlated data are often fit b
y generalized estimating equations (Liang, K. Y. and Zeger, S. L., 198
6, Biometrika 73, 13-22), which requires the marginal expectation to b
e correctly specified while the covariance structure is allowed to be
misspecified. This note is concerned with the correct specification of
the marginal mean for data from a mixed log-linear regression model a
nd the relationship between the true subject-specific parameters and t
he true marginal parameters.