The article was thin on details. But, it linked to an interesting paper
by Wade Pfau "Incorporating Home Equity into a Retirement Income
Strategy"
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2685816
The paper has a lot of math and simulations. But, as I often find with
such papers, the author makes the oddest of assumptions - a flat 25%
rate on retirement withdrawals. He suggests that one needs to withdraw
$53,333 to net $40,000. Really? A quick check at
https://turbotax.intuit.com/tax-tools/calculators/taxcaster/
and a couple taking $40,000/yr has a tax bill of $1991. Not even 5%. Add
$20,000 in SS, and the tax bill goes up to $3656, still, not even 10%. I
like this author's work, in general. My issue is starting with a premise
which, in effect takes the 4% rule, and in illustrating it, bumps right
to 5.33%, and projects from there. 30 years of that bad math, and the
results skew the wrong way.
( I realize, I didn't actually address your question. But I did look at
the paper I cited, and suggest you analyze the process yourself, never
just relying on someone else's math, including my own)