So you want to run an experiment, now what? Some Simple Rules of Thumb for Optimal Experimental Design
---- Acknowledgements -----
We thank the Editor, two anonymous referees, Glenn Harrison, Emily Oster, Stephen Raudenbush, Azeem Shaikh, and seminar participants at the University of Chicago for useful comments. Clifford Clive provided research assistance. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.