ABSTRACT
Suppose that a response yi has been observed for N statistical units. A basic assumption in this chapter is the following:
var(yi) = σ2E(yi) ∀i = 1, . . . , N. (7.1) If the possible values of responses consist of nonnegative integers and if the responses are observations from Poisson distributions, a special case with σ2 = 1 arises.
