I wonder what % of these cases could be explained by understanding how much money each parent is making. I'd wager that US Female Scientists probably make less

I wonder what % of these cases could be explained by understanding how much money each parent is making. I'd wager that US Female Scientists probably make less than their partners. I'd wager that it's more likely for a US Female Scientist to stay in her position when she makes more money than her partner. Do US Female Scientists have a preference for starting families with those who out-earn them?