could some of you give me their methods of segmenting people per age groups? Is it reasonable to assume that groups of equal age length (say 0-20, 20-40 ... etc.) have a somewhat equal proportion of people in it?
I know that in western countries the distribution might be slightly skewed as there is a greater percentage of elderly people. However, in my opinion this would make the sizing too sophisticated. What I would do is that I would acknowledge that the distribution might not be evenely and that there might be a greater proportion of elderly but I would think that for coming up with a quick market sizie it is sufficient to build on that assumption.
Is that good?