I hate to be the one to break the news to you, but an undergrad Phd track in Economics is more math intensive than an undergraduate engineering degree (except maybe Computer Engineering) , so it may not be appropriate for a kid who is not strong in math.
A standard undergrad Econ or Quantitative Econ undergrad degree coupled with an MBA might be a better career path - because it is less theoretical and hence less math intensive… An MBA usually only requires Calc 1, Linear Algebra, and Applied Statistics.
A masters degree in Economics may be another possibility.
Did your son take a Calc course in High School? How did he do?
You probably need to be more concerned about math majors than engineers. Math majors tend to be more into pure math than engineers.
Engineers in general tend to be less competitive than other disciplines because they are trained to work in teams - like they will have to work in industry. Tufts, as a culture, tends to be less competitive than other schools in the Northeast, with pre-med students tending to be the most competitive sub-group within Tufts.
I was once told by a doctor that his secret to getting good grades in pre-med science classes was to befriend the engineers - because they were accustomed to working in groups for their classes…
Math 162 is Statistics - The Math Department expands probability and statistics into a two course sequence, which goes into more depth and is more theoretical than the applied statistics courses offered through the Econ Department.
Econ majors take EC13 which is an intro Applied Statistics course with some probability- all focused on applications within the field of Economics, or EC201 which is an advanced applied statistics/probability course focusing on Economics applications.
Math 32 is part of the Econ Major as well, but Math 34 appears to only be listed as part of the Quantitative Econ Major. Maybe they are assuming that anyone wanting to pursue a Phd will major in Quant Econ.
Engineers take:
Math 32
Math 36 (applied calc 2)
Math 42
Math 51
Math 61 (Discrete Math - only computer science and computer engineers)
Math 70 (only electrical and computer engineers)
A special applied version of Probability and Stats that varies based on the field of Engineering (Mechanical Engineers have the option to take Math 162.)
So the overlap is 32, 42 and 70 for Electrical/Computer and 51 (if your son chooses to take it).