Antonia writes in with a conundrum:
As a graduate of three private schools (K-8, high school, and college), around this time of year I receive a slew of letters, emails, and phone calls asking me to pledge to various annual funds. I've always been told by my parents that I should support my former schools financially because alumni giving rates directly correlate to the prestige of any private institution. In other words, by giving even the minimum of $20, I'm ensuring the value of my diploma. Is this true?