Solution:Aссording to Gordon's model, dividend policy is irrelevant where r = k, when all other assumptions are held valid, but when the simplifying assumptions are modified to conform more closely to reality. Gordon concludes that dividend policy does affect the value of a share even when r = k.
This view is based on the assumption that under conditions of uncertainty, investors tend to discount distant dividends (capital gains) at a higher rate than they discount near dividends. Investors, behaving rationally, are riskaverse and, therefore, have a preference for near dividends to future dividends.
The logic underlying the dividend effect on the share value can be described as "The Bird-in-the-Hand Argument."