TY - JOUR AU - Ludwig,Jens AU - Kling,Jeffrey R. AU - Mullainathan,Sendhil TI - Mechanism Experiments and Policy Evaluations JF - National Bureau of Economic Research Working Paper Series VL - No. 17062 PY - 2011 Y2 - May 2011 UR - http://www.nber.org/papers/w17062 L1 - http://www.nber.org/papers/w17062.pdf N1 - Author contact info: Jens Ludwig University of Chicago 1155 East 60th Street Chicago, IL 60637 Tel: 773/834-0811 Fax: 773/834-1582 E-Mail: jludwig@uchicago.edu Jeffrey R. Kling Congressional Budget Office 3403 Ordway St NW Washington, DC 20016 E-Mail: jeffrey.r.kling@gmail.com Sendhil Mullainathan Department of Economics Littauer M-18 Harvard University Cambridge, MA 02138 Tel: 617/496-2720 Fax: 617/495-7730 E-Mail: mullain@fas.harvard.edu AB - Randomized controlled trials are increasingly used to evaluate policies. How can we make these experiments as useful as possible for policy purposes? We argue greater use should be made of experiments that identify behavioral mechanisms that are central to clearly specified policy questions, what we call “mechanism experiments.” These types of experiments can be of great policy value even if the intervention that is tested (or its setting) does not correspond exactly to any realistic policy option. ER -