soldiers serving in the Military Police and those serving in the Air Corps (the forerunner of the Air Force) about how good a job they thought their service did in recognizing and promoting people of ability. The answer was clear. Military Policemen had a far more positive view of their organization than did enlisted men in the Air Corps. On the face of it, that made no sense. The Military Police had one of the worst rates of promotion in all of the armed forces. The Air Corps had one of the best. The chance of an enlisted man rising to officer status in the Air Corps was twice that of a soldier in the Military Police. So, why on earth would the Military Policemen be more satisfied? The answer, Stouffer famously explained, is that Military Policemen compared themselves only to other Military Policemen. And if you got a promotion in the Military Police, that was such a rare event that you were very happy. And if you didn't get promoted, you were in the same boat as most of your peers--so