Based on your interest in economics, these analyses will help you refine your choices:
https://ideas.repec.org/top/top.uslacecon.html
https://ideas.repec.org/top/top.usecondept.html
Regarding your current choices, you may be especially academically suited to NESCAC LACs Amherst, Colby and Bowdoin. Along these lines, consider adding Hamilton.
With respect to the notably long length of your list, I think you could comfortably remove some schools without compromising your options.