Of the nine “Best Picture” nominees in 2012, for example, five were filmed on location in states where the production company received financial incentives, including “The Help” (in Mississippi) and “Moneyball” (in California). Virginia gave $3.5 million to this year’s Oscar-nominated “Lincoln.”

Such state incentives are widespread, and often substantial, but they don’t do much to attract jobs. About $1.5 billion in tax credits and exemptions, grants, waived fees and other financial inducements went to the film industry in 2010, according to data analyzed by the Center on Budget and Policy Priorities. Politicians like to offer this largess because they get photo-ops with celebrities, but the economic payoff is minuscule. …

In its 2012 study “State Film Studies: Not Much Bang For Too Many Bucks,” the Center on Budget and Policy Priorities found that film-related jobs tend to go to out-of-staters who jet in, then leave. “The revenue generated by economic activity induced by film subsidies,” the study notes, “falls far short of the subsidies’ direct costs to the state. To balance its budget, the state must therefore cut spending or raise revenues elsewhere, dampening the subsidies’ positive economic impact.” …

The $1.5 billion in subsidies that states provide, according to the Center on Budget and Policy Priorities, “would have paid for the salaries of 23,500 middle school teachers, 26,600 firefighters, and 22,800 police patrol officers.” Or it could have gone to cut taxes on small businesses, which, as Ms. Longoria noted in her DNC speech, produce two out of three jobs in the economy.