Table 2: Experimental activities timeline. Between sub- Practice round 1 Round 2 Round 3 Time prefer- Round 4 ject ences task Control group Effort task ex- Effort task with Effort task with Effort task with Time preferences Effort task with plained and no incentives; no no incentives; no no incentives; no task explained no incentives; prac- tice round incentives or fu- incentives or fu- incentives or fu- and given; next no incentives given. ture rounds ture rounds men- ture rounds effort task round mentioned nor men- tioned. tioned. men- tioned. not mentioned. that this is the last round. Extrinsic in- Effort task ex- Effort task with Effort task with Effort task with Time preferences Effort task with centive groups plained and no incentives; no extrinsic in- no incentives; task explained no incentives; (four separate prac- tice round incentives or fu- centive made clear that and given; next made clear that groups, each given. ture rounds no incentives effort task round no incentives with a different men- tioned. depending on are given in not mentioned. are given in this type of treatment this round, no round, not men- incentive) no future rounds future rounds tioned that this mentioned. mentioned. is the last round. 2 minutes 5 minutes 5 minutes 5 minutes No time limit 5 minutes Task time limit instructions)
Table 2: Experimental activities timeline. Between sub- ject Practice round 1 Round 2 Round 3 Time prefer- ences task Round 4 Control group Effort task ex- plained and prac- tice round given. Effort task with no incentives; no incentives or fu- ture rounds men- tioned. Effort task with no incentives; no incentives or fu- ture rounds men- tioned. Effort task with no incentives; no incentives or fu- ture rounds men- tioned. Time preferences task explained and given; next effort task round not mentioned. Effort task with no incentives; no incentives mentioned nor that this is the last round. Extrinsic in- centive groups (four separate groups, each with a different type of incentive) Effort task ex- plained and prac- tice round given. Effort task with no incentives; no incentives or fu- ture rounds men- tioned. Effort task with extrinsic in- centive depending on treatment no future rounds mentioned. Effort task with no incentives; made clear that no incentives are given in this round, no future rounds mentioned. Time preferences task explained and given; next effort task round not mentioned. Effort task with no incentives; made clear that no incentives are given in this round, not men- tioned that this is the last round. Task time limit instructions) 2 minutes 5 minutes 5 minutes 5 minutes No time limit 5 minutes
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