The Study Abroad for Penn is described here, along with the list of previously approved courses from many universities and the External Course Approval Tool. Please read this carefully, in particular the Study Abroad 101 listed on that page.
In general, there are two things students need to be very aware of:
(1) Before embarking on the trip, the student should make sure that the courses get Penn credit in the appropriate department. For example, that an economics course taken abroad will be approved for credit by the economics department.
(2) Second, the student should make sure that these courses are acceptable for the PPE major.
Sometimes, students do not know exactly which classes they will take, because the university where they plan to study will not publish their course schedule till just a few days before the start of their term. In that case, the student should try to get at least an idea of the kinds of classes that are likely to be available (perhaps based on past course offerings), and/or follow steps 1 and 2 over email/phone as soon as the course offerings are available.
For courses taken in a domestic university (other than Penn), please visit this link.
The PPE program, in conjunction with the Study Abroad office of Penn, is starting a program for PPE students in Rome, Italy. For details, please visit this page.