This function generates the model code for a single study using the
likelihood and model specified in Section 2.1, or a two-step
approach for meta-analysis with complete compliance information as
described in Section 2.2, "The two-step approach" of the package manuscript.
This function will be called internally if user uses the cace.study function.
model.study(re.values = list())It returns a model string
a list of parameter values for the random effects. It should contain the assignment for these
parameters only: n.m and n.s, which refer to the mean and standard deviation used
in the normal distribution estimation of n, as well as a.m, a.s,
alpha.s.m, alpha.s.s, alpha.b.m, alpha.b.s, alpha.u.m, alpha.u.s,
alpha.v.m, alpha.v.s. By default, this is an empty list, and all the mean are set to 0, and
alpha.n.s = alpha.a.s = 0.16, and alpha.s.s = alpha.b.s = alpha.u.s = alpha.v.s = 0.25.