Steve Postrel has served for more than half a year as O&M guest blogger, our longest-serving GB so far. Peter and I have been extremely happy for Steve’s long tenure here, for he has contributed some of the most profound posts on O&M. Not surprisingly, these posts have also been among the most popular O&M posts. Peter and I coined the internal notion of the “Postrel Effect” to refer to the surge of O&M views that has always followed a Postrel post. Luckily, Steve has promised to frequently visit O&M and comment, so perhaps this way we may still benefit from the Postrel Effect. Thanks, Steve, for your excellent work here!!