Must be a multiple of 27
Since workers can return an assignment or drop out, some "spare" participants will be created: the oTree session will have 2 times more participant objects than the number you enter here.
Introduction: Attention pledge, PLS, overview
Experiment 1: matching based on ranking characteristic (allowing for unwanted)--LP algorithm
Experiment 2: ranking snack bars (allowing for unwanted)--LP algorithm
Experiment 3 -- Ranking based on characteristics (with indifference buttons)
Experiment 4: more rankings
Survey