Office hours: Tuesday 2:30-3:30, Thursday 2:30-3:30, Friday 10:00-11:00, in McNeil 519 or by phone at (215) 898-1507. (I give preference to those physically present.)
I hold official office hours only during fall and spring terms, from first day of classes through last day of final exams. (Academic calendar here.) However, I am typically available throughout much of the rest of the year, with the same schedule.
Office hour cancellations/modifications: N/A
Note: In the unlikely event that you come to office hours but don't find me, I'm likely at Penn, but temporarily away from the office. If a few minutes pass and I don't return, please call me at 610.416.5997.