It's certainly true that it would take a good bit of capital and knowledge to do a significant job of supplying plus size clothing which is as fashionable and well made as the what's now available for thinner women, but it's a little surprising that no one's managed it. I was thinking more about manufacturers than retailers-- retailers can't sell what doesn't exist.
Your wife's problem does reflect a hard constraint-- fat women will have all the variation in skeletal proportions and muscle that thin and medium build women do plus a lot of variation in fat distribution.
If you check back at the link in my previous post, there's one fat woman who says things have gotten better, in contrast to several others who say it's mostly worse.
I'm trying to better understand the relationship between incentivization and rationality, and it occurred to me that it is a "folk fact" around here that large financial incentives don't make cognitive biases go away.
However, I can't seem to find any papers that actually say this. It's not easy to google for (I have tried) so I wonder if the Less Wrong collective memory knows how to find the papers?
Is there a pattern to which biases go away with incentivization? Do we have at least 5 examples of biases that go away with incentivization and 5 examples that don't go away with incentivization?
As an incentive, I'll paypal $10 to the commenter whose answer is least biased and most useful.