One of the biggest stories of the last four months has been the high cost of crude oil due to the U.S. war with Iran and its impact on the cost of gasoline. We know that rising gas prices hurt low-income and rural consumers disproportionately because they have a less elastic demand for gasoline. When prices go up, they still need to fill up their tanks just as frequently.
This has led to states suggesting policy changes in order to help out these people. One such proposal was to suspend gas taxes, which I’ve already written about. More recently, California and New York have suggested rollbacks of their cap-and-invest programs.
Fundamentally, cap-and-invest and the gas tax are attempting to do the same thing: address externalities associated with the consumption of gasoline. The mechanisms are different, but they both raise the price of gasoline in order to get the market to account for costs that would otherwise be imposed on society. By increasing the price of activities that generate pollution, these policies encourage consumers and businesses to reduce emissions where doing so is less costly than continuing to pollute.
What is wrong with rolling back cap-and-invest?
The core issue with these policies is that they are introducing deadweight loss into these markets and making them less efficient. The cap-and-invest program is designed to provide markets a way to interact with the cost of their carbon dioxide emissions. As long as you accept that carbon dioxide emissions have a social cost, then it is non-controversial that markets which create carbon dioxide emissions should account for that cost.
Changing these policies doesn’t do anything to change the market price of gasoline. That is largely outside the control of these governments. Suspending cap-and-invest may lead to a reduction in the price of gasoline at the pump, but it does so at the cost of higher than optimal negative externalities.
It may be the case that the goal of easing financial burdens for these affected communities is worth the cost of introducing these additional externalities, but policymakers should recognize that this is a tradeoff rather than a free source of relief. Lowering the price consumers pay by weakening environmental policy reduces the incentive to conserve fuel and increases emissions. If the objective is simply to help households cope with higher prices, there are often more targeted ways to accomplish that goal.
An alternative solution: improving access to gasoline substitutes
This is a vague suggestion because how people substitute away from gasoline consumption might look very different across the country (and it may be impossible for some), but a natural suggestion to ease the burden of rising costs is to help people increase their elasticity of demand.
In urban areas, this could be achieved by expanding public transportation services or reducing the cost of using it. Having free buses that run more frequently might encourage people to find a bus route to work instead of driving themselves. Similarly, investments in safe bicycle infrastructure or commuter rail can provide additional options that reduce dependence on gasoline over time.
In more rural communities, the available substitutes to gasoline use are more limited. Expanding vanpool programs, supporting employer-sponsored transportation, or encouraging greater access to remote work can all reduce the amount of driving households are required to do. If policymakers want to take a more long-term view of the problem, tax incentives for people to purchase EV’s could reduce the specific demand for gasoline. None of these policies eliminate the need for gasoline entirely, but they make consumers less vulnerable when prices inevitably rise.
Another option is to provide direct financial assistance to households rather than lowering the price of gasoline for everyone. Targeted tax credits or cash assistance preserve the price signal created by gas taxes or cap-and-invest programs while still helping families afford higher transportation costs. Instead of making gasoline artificially cheaper—and encouraging greater consumption—these policies allow consumers to make their own decisions about how best to use the additional income.
High gasoline prices create real hardships, particularly for households that have few alternatives to driving. But that does not necessarily mean environmental pricing policies are the wrong target. If the goal is to reduce financial burdens without sacrificing the benefits of pricing pollution, policymakers should focus on making consumers more resilient to price increases rather than ignoring the costs of externalities.
