Table 5 Description of main variables

Six ordinal variables (1 variable for each of the six vaccines) that capture the willingness to recommend vaccine to another person

Response category: 7-point Likert scale from 1 (unlikely) to 7 (very likely)

Satisfaction with five government institutions/person

Response: 7-item Likert scale (1=very dissatisfied, 7=very satisfied

Willingness to download COVID warning application to smartphone (0=unwilling, 1=maybe, 2=willing)

Willingness to refresh DPT (diphtheria, pertussis, and tetanus) vaccine in the future; (0=unwilling, 1=maybe, 2=willing)

Questions related to how life (cafes, travels) will look like in October 2021, Response: 7-point Likert scale, (1=very unlikely, 7=very likely)

Age in years

Gender of respondent (0=male, 1=female)

Dummy variables for the highest completed level of education (0=no, 1=yes); 4 variables for 5 different levels

General risk question, Response is based on 7-point Likert scale (1=unwilling to take any risk,7=very willing to take risks)

General patience question, Response is based on 10-point Likert scale, (1=very impatient, 10=very patient)

Hypothetical lottery win. Respondents are asked to imagine to win 1,000 Euro in a lottery. How much of the win would they share with an unknown random person

Response can be between 0 and 1,000 Euro

Belongs to COVID-19 health risk group (0=no, 1=yes)

Dummy variables indicating whether respondent was vaccinated with Pfizer/BioNTech or AstraZeneca (0=no, 1=yes)

Survey link from social media platform (0=instagram, 1=facebook)

Survey was taken on smart phone (0=no, 1=yes)

Five dummy variables indicating order of questions related to the recommendations for a specific vaccine (0=no, 1=yes)