At top 10-15 US schools, undergrad econ is usually considered an equivalent to engineering, physical science, comp sci, and math because there is a very high degree of quantitative emphasis according to Wall Street Oasis.
I know at least one Ivy League school has a two-track major in Economics: Economics with calculus for future economists and quants; economics without calculus for people heading into investment banking or consulting who aren't up for the math and just need a general ground in how economies work.
