vector of real estimates to be converted to link
values
model
MARK model object used only to obtain model
structure/links etc. If function is being called for
model averaged estimates, then amy model in the model
list used to construct the estimates is sufficient
parm.indices
index numbers from PIMS for rows in
design matrix(non-simplified indices); x[parm.indices]
are computed
vcv.real
v-c matrix for the real parameters
use.mlogits
logical; if FALSE then parameters with
mlogit links are transformed with logit rather than
mlogit for creating confidence intervals for each value
Value
A list with the estimates (link values) and the links
that were used. If vcv.real = TRUE, then the v-c matrix
of the links is also returned.
Details
It has 2 uses both related to model averaged estimates.
Firstly, it is used to transform model averaged estimates
so the normal confidence interval can be constructed on
the link values and then back-transformed to real space.
The second function is to enable parametric bootstrapping
in which the error distbution is assumed to be
multivariate normal for the link values. From a single
model, the link values are easily constructed from the
betas and design matrix so this function is not needed.
But for model averaging there is no equivalent because
the real parameters are averaged over a variety of models
with the same real parameter structure but differing
design structures. This function allows for link values
and their var-cov matrix to be created from the model
averaged real estimates.