Supporting evidence from Milgram's variation in a run-down office building in Bridgeport, USA and found obedience levels dropped to 47.5%.
Milgram's original experiment at the prestigious YaleUniversity found obedience levels to be 65%.
Modigliani & Rochat (1995) reviewed the transcripts from Milgram's variation at the run-down office block, and found the earlier people protested, the less likely they were to obey.