As far as I'm aware, the public data exists to disclose the net worth of US Senators/House members both as they enter Congress, and as they leave it (or current data if they are active).
Is there any good research on what the relative average net worth is for different political groupings of Congresspeople, both at their entrance when first elected, and at their retirement (or current networth for those still serving)?
I'm interested in analysis across all sorts of groupings - both the more obvious (party membership, or which house they are in) as well as less obvious, such as radicalism/moderation as defined by for example DW-Nominate; or establishment vs. outsiders; pre-congress careers; geography; length of elected service; decade when they were first elected; etc... Pretty much any grouping that someone like Nate Silver would find scientific enough to measure things across would be of interest.
Ideally, a good answer would include some sort of regression analysis to show which of the grouping factors correlate and/or predict net worth best.