I just don't get it--even when we "gain" an hour in Autumn, our internal clock is knocked out of whack. Years ago I read that there's an increase in automobile accidents and heart attacks when the clocks are changed. It has to affect productivity as well (except for you Amy).
After a couple of minutes googling this morning I did find some articles on the Spring time change, but not Autumn (1, 2).
Part of me wishes we'd stop daylight savings time and part of me understands why we do it, but I would like to see a review about whether it's worth the slight increase in accidents to continue.