This is actually an interesting question: What fraction of the households in the top 1% are there because they have two salaries in the $150k-$200k range and wh

This is actually an interesting question: What fraction of the households in the top 1% are there because they have two salaries in the $150k-$200k range and what fraction are there because they have a single high earner? You're assuming that it's mostly the former, but it's not obvious to me why this should be the case, necessarily. It'd depend on salary distribution within various fields and across fields.... I haven't been able to find good data on individual income, sadly. At least in part because if one uses AGI then all you have to go with are tax returns and if a married couple files jointly the AGI will just be the joint number and that's that. But people also keep claiming this is "household" income, which doesn't quite match AGI in many cases (e.g. married-filing-separately situations, households which consist of taxpayers who are not married to each other, households with more than 2 taxpayers, etc). I really wish the data-gathering methodology were actually spelled out somewhere. :(