I think it depends on which school you want to take the economics major, because each school has different requirements, and some schools need different books for professional courses when they take the second interview! The books to be read in general economics should include Gao Hongye's two books on western economics, macro and micro, as well as related political economics and so on! ! I am also a math major, but I am a teacher! As for employment, it depends on what you think! See what you are interested in, and then find a job according to your major!