January 15, 2025

Pace of Climate Change Sends Economists Back to Drawing Board

Carbon taxes and emissions trading systems have been instituted in many places, such as Denmark and California. But a federal measure in the United States, setting a cap on carbon emissions and letting companies trade their allotments, failed in 2010.

At the same time, Dr. Nordhaus’s model was drawing criticism for underestimating the havoc that climate change would wreak. Like other models, it has been revised several times, but it still relies on broad assumptions and places less value on harm to future generations than it places on harm to those today. It also doesn’t fully incorporate the risk of less likely but substantially worse trajectories of warming.

Dr. Nordhaus dismissed the criticisms. “They are all subjective and based on selective interpretation of science and economics,” he wrote in an email. “Some people hold these views, as would be expected in any controversial subject, but many others do not.”

Heather Boushey, a member of the White House’s Council of Economic Advisers who handles climate issues, says the field is learning that simply tinkering with prices won’t be enough as the climate nears catastrophic tipping points, like the evaporation of rivers, choking off whole regions and setting off a cascade of economic effects.

“So much of economics is about marginal changes,” Dr. Boushey said. “With climate, that no longer makes sense, because you have these systemic risks.” She sees her current assignment as similar to her previous work, running a think tank focused on inequality: “It profoundly alters the way people think about economics.”

To many economists, the approach pioneered by Dr. Nordhaus was increasingly out of step with the urgency that climate scientists were trying to communicate to policymakers. But a carbon tax remained at the center of a bipartisan effort on climate change, supported by a panoply of large corporations and more than 3,600 economists, that also called for removing “cumbersome regulations.”

Article source: https://www.nytimes.com/2022/08/25/business/economy/economy-climate-change.html

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