This study examines whether heterogeneous beliefs contribute to the incidence of the disposition effect. We measure optimism using elicited beliefs from incentivized experiments and surveys and link these measures to investment decisions using administrative register data. We find that...

A common problem in household finance is that households are often inactive in response to incentives. Mortgages are generally the largest household liability, and mortgage refinancing is an important channel for monetary policy transmission, so inactivity in this setting can be socially costly....