Over on bogleheads, they're discussing a new retirement book: "Living off of your Money". It's available in hardback from Amazon, but is a bit pricy. Several folks there have contacted their local library to get a copy. A pdf version of the book is also available from the author's website (slightly cheaper) at Investing During Retirement
where the first 3 chapters can be downloaded for free.
The first couple of chapters are more like an extended introduction (hey, it's free), but the third chapter introduces a withdrawal method I haven't seen before - "prime harvesting" that's worth a look.
The remaining chapters, if you buy the book, go into various known variable withdrawal methods, comparing and winnowing down to a few winners.
The author goes at length to use multiple sources of returns for his backtesting, including several different countries. He also goes into detail into how he avoids datamining (out of sequence testing, multiple sources of returns, multiple countries). It is fairly detailed and not for the casual reader.
The boglehead thread is at: https://www.bogleheads.org/forum/vie...ewpost=2923990