COVID-19 Vaccination Take-Up

Purpose

In this work, the investigators are partnering with Contra Costa Health Services (CCHS), the department of health in Contra Costa County, CA, to measure COVID-19 vaccinations and other COVID-19 related preventive health behaviors in the county's Medicaid managed care population. This work will test ways to increase COVID-19 vaccine uptake. The investigators hypothesize that small financial incentives and other low-cost behavioral nudges can be used to increase vaccine uptake and reduce disparities in uptake among diverse racial/ethnic minority populations.

Conditions

  • Covid19
  • Vaccination

Eligibility

Eligible Ages
Over 18 Years
Eligible Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • age 18 and over - member of Contra Costa Health Plan (CCHP)

Exclusion Criteria

  • contraindications to vaccination, as determined by county health plan or other medical staff.

Study Design

Phase
N/A
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Health Services Research
Masking
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Placebo Comparator
Control Arm 		No messaging about COVID-19 vaccination
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
Experimental
Emotional message 		Participants view an emotional video from the state of California about getting back to normal.
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
Experimental
Safety and effectiveness message 		Participants view a video with information about the safety and effectiveness of the COVID-19 vaccines
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
  • Behavioral: Race concordant
    Randomized to a messenger who is race concordant with the participant
  • Behavioral: Gender concordant
    Randomized to a messenger who is gender concordant with the participant
Experimental
Consequences message 		Participants view a video with information about the consequences of not getting vaccinated against COVID-19.
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
  • Behavioral: Race concordant
    Randomized to a messenger who is race concordant with the participant
  • Behavioral: Gender concordant
    Randomized to a messenger who is gender concordant with the participant

Recruiting Locations

More Details

NCT ID
NCT04867174
Status
Completed
Sponsor
National Bureau of Economic Research, Inc.