This article "Revenge of the nerds" was written by the Data Team from The Economist. It is a daily chart that explains which degrees give the best financial returns. It concerns all degrees from American Universities (Sample of 452 institutions; based on 2012-13 costs.)
More blue points at the top means higher return for engineering, computer science and maths degrees. Note that admission rate does not seem to have a big impact on ROI, as if high admission rate comes with lower tuition fees, and thus lower salary to achieve same ROI as low-admission-rate (presumably more expensive) schools.
Sources for the data:: PayScale; National Centre for Education Statistics.