| Field | Before | After |
|---|---|---|
| Field Final Sample Size: Number of Clusters (Unit of Randomization) | Before | After 1254 pairs of individuals |
| Field Was attrition correlated with treatment status? | Before | After No |
| Field Final Sample Size: Total Number of Observations | Before | After 1254 pairs of individuals |
| Field Final Sample Size (or Number of Clusters) by Treatment Arms | Before | After 66 pairs of individuals in control; 597 pairs of individuals with flexible incentives (300 with $3 incentive, 297 with $7 incentive); 591 pairs of individuals with routine incentives (297 with $3 incentive, 294 with $7 incentive) |
| Field Is there a restricted access data set available on request? | Before | After No |
| Field Program Files | Before | After No |
| Field Is data available for public use? | Before | After No |
| Field | Before | After |
|---|---|---|
| Field Paper Abstract | Before | After Habits involve regular, cue-triggered routines. In a field experiment, we tested whether incentivizing exercise routines—paying participants each time they visit the gym within a planned, daily two-hour window—leads to more persistent exercise than offering flexible incentives—paying participants each day they visit the gym, regardless of timing. Routine incentives generated fewer gym visits than flexible incentives, both during our intervention and after incentives were removed. Even among subgroups that were experimentally induced to exercise at similar rates during our intervention, recipients of routine incentives exhibited a larger decrease in exercise after the intervention than recipients of flexible incentives. |
| Field Paper Citation | Before | After Beshears, John, Hae Nim Lee, Katherine L. Milkman, Robert Mislavsky, and Jessica Wisdom. "Creating Exercise Habits Using Incentives: The Trade-off Between Flexibility and Routinization." Management Science 67, no. 7 (July 2021): 4139–4171. |
| Field Paper URL | Before | After https://doi.org/10.1287/mnsc.2020.3706 |