Refer to Table 11.13 on attitudes toward legalized abortion. For the response Y t (1=support legalization, 0=oppose.for question t ( t =1, 2, 3.and for gender g (1=female, 0=male., consider the model...

Refer to Table 11.13 on attitudes toward legalized abortion. For the responseY_t
(1=support legalization, 0=oppose.for questiont(t=1, 2, 3.and for genderg(1=female, 0=male., consider the model logit[P(Y_t
=1)]=α+γg+β
_t
with β₃=0.

a.A GEE analysis using unstructured working correlation gives correlation estimates 0.826 for questions 1 and 2, 0.797 for 1 and 3,  and 0.832 for 2 and 3. What does this suggest about a reasonable working correlation structure?

b.Table 11.13 shows a GEE analysis with exchangeable working correlation. Interpret effects.

c.Treating the three responses for each subject as independent observations and performing ordinary logistic regression Give a heuristic explanation of why within-subject standard errors are much larger than with GEE, yet the between-subject standard error is smaller.