Has the optimal gas tax been identified?

Mass High Tech's Kyle Alspach

In 2007, a study in the Journal of Economic Literature found that the ideal average gas tax for the U.S. would be $2.10 a gallonhttp://www.blogger.com/img/blank.gif. At the time, the average tax was 40 cents a gallon — 18.4 cents for federal and 22 cents for state (it’s currently 23.5 cents in Massachusetts).

The $2.10 figure takes into account greenhouse gas emissions, local pollution and oil dependency, along with the costs of congestion and accidents.

To make the tax palatable, economists say the government could cut taxes in other areas — say, the income tax for consumers or corporate taxes for businesses.

The tax trade-off seems like a reasonable idea but revenue-hungry politicians would never take up the offer.

In the rush to move toward a Pigouvian tax model, supporters of higher taxes tend to forget that such excise taxes are regressive. More than they did in the past, low-income workers rely more heavily on jobs in the suburbs and most use cars to get there.