Typicality-based chance

Abstract I use typicality to formulate and defend a functional characterization of chance. According to the characterization, called ‘Typicality-Based Chance’, to be a chance is to be typically approximated by possible frequencies, where the details of the approximation are expressed by the law of large numbers. Among its other virtues, Typicality-Based Chance supports an attractively empiricist answer to a persistent question in the literature—often raised by those who view typicality with suspicion—concerning what justifies the mathematical measures used to express facts about typicality.