This chapter summarises the findings of studies that attempt to quantify the impact of tobacco use on the economy (17.2) and the economic rationale for intervention in the tobacco market (17.3). It also summarises information about the cost effectiveness (or value for money) of available tobacco control interventions (17.4), the evidence about the economic impact of tobacco control interventions on specific industries (17.5), and finally expert recommendations about optimal levels of investment in tobacco control (17.6).