Mental Accounting,Access Motives,and Overinsurance*

The access motive for insurance posits that insurance derives its value from providing access to a loss remedy that is unaffordable without insurance. I explore the potential of this alternative insurance motive to explain attitudes towards modest risks, and I argue that mental accounting makes the access motive relevant for understanding both the popularity of warranties and the avoidance of deductibles. The value of partial insurance is shown to critically depend on the way in which the insurer pays benefits. This can explain several empirical regularities that are difficult to reconcile within existing models.