@ucbalumnus - I am surprised to see no calculus requirement for economics majors at any university. My son was an economics major at Case Western and his advisor encouraged him to take the harder Calculus/Statistics courses (for STEM majors) even though he could graduate with the lower level Calc/Stats. Case also offered several classes as calc based or not calc based. His advisor encouraged all the economics majors to take the calc based courses.
He also told my son that if he ever wanted to go to grad school and study economics he should study math as an undergrad. My son changed to a double major (math/econ). He is now working at a bank and says that the quantitative skills are more highly valued than the business/economic knowledge. He might be biased though because he is in a program geared towards developing quantitative analysts.