ABSTRACT
It is scarcely eighteen months since I finished writing a chapter about experimental economics for a collection of papers designed to familiarize undergraduates with various developments at the frontiers of microeconomics. Rereading that chapter as part of the preparation for writing this one, I became conscious of just how much more experimental material has appeared during the last year and a half, and how rapidly the quantity and quality of this literature continues to grow. But I also became conscious of another reaction: the feeling that now that experimental methods have demonstrated their potential by producing a range of articles which have earned places in all the major economics journals, we may in future need to pay increasing attention to some of the problems and limitations which have come to light.
