Packerman, I've seen some research like that too, but a while a go when things were more, shall we say, rosy based on growth Indexes etc. At other times it has not worked.
Thing is, psychologically, most retirees are uncomfortable about selling investments to pay for their income / lifestyle because there are no more pay-days.
My belief is have a good years worth of income in something 'reliable' and top up with some profits when something seems to have topped out. Keeping the same $ amount in growth but skimming off some gains can build a buffer for the inevitable reversal. Prospective profits don't put food on the table or pay the Travel Agent.
PS: remember that most posters here are active and diligent investors, so this may not be a good sample for asking 'general' questions and opinions about what should be done or what is correct. Everyone to their own.
