Introduction
This chapter describes a public interest approach to gambling. Issues are approached from the perspective of what policies will best serve the public good, and minimize the individual and collective harms related to the activity. Public policy on gambling faces two problems. First, gambling produces public revenue which, simultaneously, generates costs due to gambling-related problems. Secondly, vested interests in gambling revenue can limit harm prevention efforts in the public interest. This perspective leads us to include in the analysis not only the game and the gambler but also the political economy of gambling. At both the individual and societal levels, scientific research on gambling and gambling policy can provide a valuable tool for the policymaker.