TY - JOUR AU - Banerjee,Abhijit V. AU - Duflo,Esther TI - The Experimental Approach to Development Economics JF - National Bureau of Economic Research Working Paper Series VL - No. 14467 PY - 2008 Y2 - November 2008 UR - http://www.nber.org/papers/w14467 L1 - http://www.nber.org/papers/w14467.pdf N1 - Author contact info: Abhijit Banerjee MIT Department of Economics E52-252d 50 Memorial Drive Cambridge, MA 02142-1347 Tel: 617/253-8855 Fax: 617/253-1330 E-Mail: banerjee@mit.edu Esther Duflo Department of Economics MIT, E52-252G 50 Memorial Drive Cambridge, MA 02142 Tel: 617/258-7013 Fax: 617/253-6915 E-Mail: eduflo@mit.edu AB - Randomized experiments have become a popular tool in development economics research, and have been the subject of a number of criticisms. This paper reviews the recent literature, and discusses the strengths and limitations of this approach in theory and in practice. We argue that the main virtue of randomized experiments is that, due to the close collaboration between researchers and implementers, they allow the estimation of parameters that it would not otherwise be possible to evaluate. We discuss the concerns that have been raised regarding experiments, and generally conclude that while they are real, they are often not specific to experiments. We conclude by discussing the relationship between theory and experiments. ER -