TWO American researchers have been awarded the Nobel Prize in Economics for studying the interplay of climate change and technological innovation with economics.

William Nordhaus of Yale University and Paul Romer of New York University were announced winners of the 9-million-kronor (US$1.01 million) prize yesterday by the Royal Swedish Academy of Sciences.

The academy said Romer’s work “explains how ideas are different to other goods and require specific conditions to thrive in a market.” Previous macroeconomic research had emphasized technological innovation as a driver of growth but had not modelled how market conditions and economic decisions affected creation of new technologies, the academy said.

Nordhaus in the 1990s became the first person to create a model that “describes the global interplay between the economy and the climate,” the academy said. He showed that “the most efficient remedy for problems caused by greenhouse gases is a global scheme of universally imposed carbon taxes.”

The prize comes just a day after an international panel of scientists issued a report detailing how Earth’s weather, health and ecosystems would be in better shape if the world’s leaders could somehow limit future human-caused warming to just 0.9 degrees Fahrenheit (a half degree Celsius) from now, instead of the globally agreed-upon goal of 1.8 degrees F (1 degree C).

Nordhaus has argued that climate change should be considered a “global public good,” like public health and international trade, and regulated accordingly, but not through a command-and-control approach. Instead, by agreeing on a global price for burning carbon that reflects its whole cost, this primary cause of rising temperatures could be traded and taxed, putting market forces to work on the problem.

Many economists have since endorsed the concept of taxing carbon and using this financial lever to influence societal behavior. But adopting the regulatory frameworks on a global scale has been a complex challenge, and the world’s political leaders are failing to meet it, the head of the United Nations said last month.

U.N. Secretary-General Antonio Guterres bluntly told leaders in New York that unless current emission trends for greenhouse gases are reversed by 2020, it will be impossible to keep global warming below 1.5 degrees Celsius (2.7 degrees Fahrenheit), which was a key goal of the 2015 Paris climate accords. The U.N. chief challenged governments to end fossil fuel subsidies, help shift toward renewable energy and back a price for carbon emissions that reflects their actual cost. He cited, for example, that climate-related disasters already cost the world US$320 billion last year, a figure likely to grow with increased warming.

The economics prize is the last of the Nobels to be announced this year. This year’s awards have stood out for two reasons.

Proceedings have been overshadowed by the absence of the literature prize, postponed to give the Swedish Academy time to restore public trust after a sexual assault scandal.

Three women have been awarded Nobel prizes, an unusually large number for a single year.

Other Nobel awards announced earlier:

Peace Prize: Denis Mukwege and Nadia Murad

Prize in Physiology or Medicine: James P. Allison and Tasuku Honjo

Prize in Chemistry: Frances H. Arnold, George P. Smith and Sir Gregory P. Winter

Prize in Physics: Arthur Ashkin, Gerard Mourou and Donna Strickland

(SD-Agencies)