Big hat tip to Doomster NVmike, and assist to Phoenix area realtor Greg Swann, for noticing this blog post by BusinessWeek’s Senior Economics Editor.[1]

[BW post withdrawn ... replaced as follows, JM]: "Dear Readers, I posted an item yesterday questioning the precision of MLS data in Phoenix, Tucson, and Las Vegas, but several people are questioning my questions, so I pulled the item off the blog until I can sort out the truth. I hope to have something to say on this subject next week."

 

As it happens, Greg didn’t just pass on the link, he contributed some criticism,[2] too.

"Was a big-time Sixth Avenue media giant flim-flammed by a Gilbert, AZ, housewife, nom de guerre ‘Twist,’ who has set herself up as an authority on the residential real estate market and its feverishly-sought collapse?

As it turns out, the only thing wrong with this [3] is everything.

I have no idea why we’re talking about November and December of 2005 and January of 2006, but these are the actual numbers for Expired, Cancelled, Sale Pending and Temporarily Off Market listings from those months, …

Why are so few homes listed as Sale Pending or Temporarily Off Market? Because the status of those listings has changed in the intervening months, most of them to Sold.

I have no idea what ‘Twist’ was failing to measure, but a Realtor would only be concerned with Expired and Cancelled listings, recognizing that the other two categories are nebulous and subject to change.

And, obviously: Bubble bloggers are notoriously reckless with numbers. They have an agenda, so they tend to throw out any data that do not fit their preconceptions. I have no idea if that’s what has happened here, but I can’t see any way for ‘Twist’ to have made an honest error."

 

Clearly, these are just the opening moves. BW likely hasn’t exausted its ammunition with Peter’s short post. Greg shot from the hip, putting up a bunch of MLS numbers (asserted to be checked by some realtor commenters) from the same era as those covered by Twist. I don’t know if the two sets even relate to each other, but at least the initial REIC aspersions came with a smattering of allegedly relevant facts. Full courage points assigned for coming to a screeching halt just short of libel in that last quoted sentence. ;)

And speaking of namecalling, you’d think Greg could do better than repeating Twist’s handle a half-dozen times with quotes. His post title showed some originality, but doesn’t parse very well (the obvious reading of the last word is as a newly discovered occupational hazard). I’ll forgive him for that, though. He contributed a really good title for this effort.

And one last thing. Someone should mention to Greg that Twist is a homemaker who does post-Masters degree level hard sciences research and has published in a field where statistical analysis is the bulk of the work. It is just possible she can recognize a data set when she sees one.

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Notes and References

[1]: "Fuzzy Realtor Numbers In Phoenix, Tucson, and Vegas", by Peter Coy, Hot Property blog, BusinessWeek, January 3, 2007.

[2]: "Twisted minds: Was BusinessWeek bamboozled by bubble-blogstress?", by Greg Swann, Phoenix area realtor’s blog, January 4, 2007.

[3]: Greg had been quoting from [1] prior to that sentence.