Field Experiments这两年很火啊，此文值得一读！
Field Experiments in Economics


David H. Reiley and John A. List+
First Version: February 2007
Current Version: May 2007
Abstract
Field experiments have grown significantly in prominence over the past
decade. In this essay, we provide a summary of the major types of field
experiments, explore their uses, and describe a few examples. We show
how field experiments can be used for both positive and normative
purposes within economics. We also discuss more generally why data
collection is useful in science, and more narrowly discuss the question of
generalizability. In this regard, we envision field experiments playing a
classic role in helping investigators learn about the behavioral principles
that are shared across different domains.