To the extent that 'good' equals 'fashionable' for clothing I suspect this is a harder problem than it initially seems. What is fashionable is largely defined by what trend setting / fashionable people are currently wearing and the set of trend setting / fashionable women is almost entirely disjoint from the set of fat women. Therefore styles and cuts that are designed to flatter fat women will never become fashionable and fashionable clothing will not scale up well to body shapes it was not designed for.
If you actually wanted to address this issue you'd have to make fat women into trend setters which is a much harder problem than simply scaling up fashionable clothing. The market need you have identified is largely targeted by the dieting and weight loss industries which are very large and profitable.
In this context, "good" means durable, pleasant-looking, and not unfashionable.
From what I've seen of the clothes that fat women are enthusiastic about, they tend to be somewhat simpler and more classic looking than the mainstream. I don't know whether this is making the best of what's available, or whether most thin women would prefer that sort of thing if they could get it.
Or maybe my perceptions of the difference are off. I'm actually not that interested in clothes.
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.