<p>ECE and Economics is definitely possible, but you will have to manage your time very efficiently and take a heavy load to graduate in 4 years, assuming you do not receive many AP credits. If you come in with AP Calc BC and place out of Math 116, AP Chem and AP Physics C, you should be able to finish in 4 years without too much of a struggle. Although I do not know any students who doubled in ECE and Econ, I know a few who double majored in ChemE pr MechE and Econ, and they finished in 4 years.</p>