Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
In a large number of decisions, the option that does not require a specific action such as filling in a form is chosen frequently. It is a stylized fact that opt-in or opt-out designs for otherwise identical choices lead to vastly different outcomes. Choice options are chosen more frequently simply because they are the no-action alternative or default option. However, direct empirical evidence on the reasons for the popularity of defaults is scarce. We devised a special survey module for the Dutch DNB Household Survey to study potential explanations for default choices. We find that the popularity of the default option is related to different personal traits in economic and non-economic decisions. Financially literate individuals are more likely to take action and opt out the default option in economic decision-making. In non-economic decisions, procrastination increases the popularity of the default while individuals who care much about the opinion of others are more inclined to deviate from the default.