Sample size (or number of clusters) by treatment arms
60 subjects total (MTurk): 30 subjects for each of NARROW BEFORE and NARROW AFTER
- Brief explanation (April 30th, 2019, 22PM CET): Ideally we would not run this yet, but due to a conference deadline we feel we need some preliminary results.
120 subjects total (MTurk): 40 subjects per group in W10, W40, and W70, with a low-effort (W10) medium-effort (W40) and high-effort (W70) group. Each of those groups is asked for their WTW after having done their required work, given by 10, 40, or 70 tasks.
- Explanation: This is needed to test whether tasks done early are less tedious than when done later, which is an identifying assumption of ours. Since we won't ask in these to choose future work, nor compare any narrow choice with a broad choice, we cannot use this to bias our results. We also use this to find out whether the slider task is more precise or the price list. Whichever has the lower variance (higher precision) between the three effort-level groups. If they are too similar (that is, neither of them is particularly different) then we will go with a 60% slider, 40% price list split for the main groups.
140 subjects for each of the 5 main treatments treatments and 100 subjects in the within subjects treatment.