Study Summary
This trial will test whether group commitment contracts help people quit smoking and lose weight.
Eligible Conditions
- Weight Loss
- Smoking Cessation
Treatment Effectiveness
Effectiveness Progress
Study Objectives
2 Primary · 0 Secondary · Reporting Duration: 6 months
6 months
Smoking Cessation
Smoking Cessation / Weight Loss
Smoking Cessation / Weight Loss by Sex/Gender, Race, and Ethnicity
Smoking Cessation by Ethnicity
Smoking Cessation by Race
Smoking Cessation by Sex/Gender
Trial Safety
Safety Progress
Side Effects for
Intervention
5%increased coughing following smoking cessation
Trial Design
7 Treatment Groups
Control
1 of 7
Group Commitment Contract
1 of 7
Individual Monetary Rewards + Information
1 of 7
Group Commitment Contract + Information
1 of 7
Individual Commitment Contract
1 of 7
Individual Monetary Rewards
1 of 7
Individual Commitment Contract + Information
1 of 7
Active Control
Experimental Treatment
3600 Total Participants · 7 Treatment Groups
Primary Treatment: Information · No Placebo Group · N/A
Group Commitment Contract
Behavioral
Experimental Group · 1 Intervention: Group Commitment Contract · Intervention Types: BehavioralIndividual Monetary Rewards + InformationExperimental Group · 2 Interventions: Information, Individual Monetary Rewards · Intervention Types: Other, Behavioral
Group Commitment Contract + InformationExperimental Group · 2 Interventions: Information, Group Commitment Contract · Intervention Types: Other, Behavioral
Individual Commitment Contract
Behavioral
Experimental Group · 1 Intervention: Individual Commitment Contract · Intervention Types: BehavioralIndividual Monetary Rewards
Behavioral
Experimental Group · 1 Intervention: Individual Monetary Rewards · Intervention Types: BehavioralIndividual Commitment Contract + InformationExperimental Group · 2 Interventions: Information, Individual Commitment Contract · Intervention Types: Other, Behavioral
ControlNoIntervention Group · 1 Intervention: Control · Intervention Types:
Trial Logistics
Trial Timeline
Screening: ~3 weeks
Treatment: Varies
Reporting: 6 months
Who is running the clinical trial?
National Bureau of Economic Research, Inc.Lead Sponsor
28 Previous Clinical Trials
770,308 Total Patients Enrolled
Northwestern UniversityOTHER
1,456 Previous Clinical Trials
786,169 Total Patients Enrolled
8 Trials studying Weight Loss
1,262 Patients Enrolled for Weight Loss
Martin Valdivia, PhDPrincipal InvestigatorGRADE
Dean Karlan, PhDPrincipal InvestigatorNorthwestern University
2 Previous Clinical Trials
4,632 Total Patients Enrolled
Anna Tuchman, PhDPrincipal InvestigatorNorthwestern University
Jonathan Zinman, PhDPrincipal InvestigatorDartmouth College
1 Previous Clinical Trials
3,000 Total Patients Enrolled
Eligibility Criteria
Age 18+ · All Participants · 7 Total Inclusion Criteria
Mark “Yes” if the following statements are true for you:You are able and willing to take an at-home verification test.
You are underweight with a BMI of 18.5 or higher.
Who else is applying?
What state do they live in?
| Nebraska | 50.0% |
| Wisconsin | 50.0% |
How old are they?
| 18 - 65 | 100.0% |
What site did they apply to?
| Northwestern University, Global Poverty Research Lab | 100.0% |
What portion of applicants met pre-screening criteria?
| Met criteria | 100.0% |
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Conditions
Cancer Related
Treatments