The American Economic Association's registry for randomized controlled trials
First published corresponds to when the trial was first made public on the Registry after being reviewed.
Last updated is the most recent time when changes to the trial's registration were published.
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MD5: cbc2ca40161f691998e343f65e1173e2
SHA1: d48cfad035c94259e1ec6344f71df32a4aec645f
Uploaded At: August 15, 2013
MD5: da3daa5365e12906540bb10a435e16b0
SHA1: 6cbd346c82b25b350c526a9925a3fe4b093bc4b7