Study: NCT02421224

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Deposits
Description: Participants will have to deposit a certain amount of their own money at enrollment. Participants will be able to make additional voluntary deposits above the minimum amount during the intervention period. The participant will be refunded all deposits if he quits smoking at 3 months, as verified by a urine cotinine test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine cotinine test.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Deposits
Description: Participants will have to deposit a certain amount of their own money at enrollment. Participants will be able to make additional voluntary deposits above the minimum amount during the intervention period. The participant will be refunded all deposits if he quits smoking at 3 months, as verified by a urine cotinine test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine cotinine test.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Deposits
Description: Participants will have to deposit a certain amount of their own money at enrollment. Participants will be able to make additional voluntary deposits above the minimum amount during the intervention period. The participant will be refunded all deposits if he quits smoking at 3 months, as verified by a urine cotinine test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine cotinine test.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Deposits
Description: Participants will have to deposit a certain amount of their own money at enrollment. Participants will be able to make additional voluntary deposits above the minimum amount during the intervention period. The participant will be refunded all deposits if he quits smoking at 3 months, as verified by a urine cotinine test. The participant will forfeit all deposits if he continues to smoke at 3 months, as verified by a urine cotinine test.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Small Individual Bonus
Description: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Small Individual Bonus
Description: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Large Individual Bonus
Description: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. The bonus is twice the value of that in the Small Individual Bonus group.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Large Individual Bonus
Description: Each participant will receive a monetary bonus from the study investigators if he or she quit smoking, as verified by a urine cotinine test. The bonus is twice the value of that in the Small Individual Bonus group.