Not exactly an experiment but the asynchronous approach is interesting. Not nearly enough people have tried this. I recall Paul Romer long ago discussing the potential advantages of an asynchronous experiment approach.
The Classroom as Policy Laboratory: Using a Classroom Simulation to Experience Macroeconomic Policy
From:
Alan Green
Lander University
The Classroom as Policy Laboratory: Using a Classroom Simulation to Experience Macroeconomic Policy
From:
Alan Green
Lander University