We test the same pool of subjects on a series of standard tasks in behavioral economics, assigning randomly half of the pool to a classical laboratory and letting the other half perform the experiment on their smartphones, outside the lab, with an app that we have developed.
We measure the difference in behavior between the two treatments.
We find very small significant discrepancies: they behave in the same way with respect to risk attitudes, cognitive tasks, strategical reasoning and beliefs about the actions of other players.
If any, subjects on the app (i.e. outside the lab) are more prone to errors on boring tasks, prefer to provide a wrong answer rather than letting time expire, and (surprisingly) tend to be slightly more generous with respect to other subjects in the same session.
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