Sign up for our daily briefing

Make your busy days simpler with Axios AM/PM. Catch up on what's new and why it matters in just 5 minutes.

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Catch up on coronavirus stories and special reports, curated by Mike Allen everyday

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Denver news in your inbox

Catch up on the most important stories affecting your hometown with Axios Denver

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Des Moines news in your inbox

Catch up on the most important stories affecting your hometown with Axios Des Moines

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Minneapolis-St. Paul news in your inbox

Catch up on the most important stories affecting your hometown with Axios Twin Cities

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Tampa Bay news in your inbox

Catch up on the most important stories affecting your hometown with Axios Tampa Bay

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Charlotte news in your inbox

Catch up on the most important stories affecting your hometown with Axios Charlotte

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Please enter a valid email.

Please enter a valid email.

Subscription failed
Thank you for subscribing!

Students working on computers. Photo: David L. Ryan/The Boston Globe via Getty Images

Hotter temperatures cut academic achievement by inhibiting cognitive skill development, but more air conditioning in schools can mitigate those harms, new research on U.S. students shows.

Why it matters: The findings on how heat lowers the "productivity of instructional time" provides new data points on the effect of higher temperatures on human welfare and performance. (The National Bureau of Economic Research circulated the paper on Monday, and it can be downloaded here.) It concludes that air conditioning's economic benefits far outweigh installation and operation costs.

The findings:

  • "Without air conditioning, each 1° F increase in school year temperature reduces the amount learned that year by one percent," it finds.
  • "[W]e estimate that school air conditioning would offset over $25,000 per classroom per year in future lost earnings due to temperature increases predicted by climate change models," the study states.
  • It's authored by experts in economics and policy from Harvard's Kennedy School of Government, the College Board and elsewhere.

What they did: The paper explores 21 million test scores from around 10 million high school kids who took the PSAT exam at least twice, and combines it with local temperature data in the year preceding the test.

One troubling conclusion: "We argue that heat effects account for up to 13 percent of the U.S. racial achievement gap, both because black and Hispanic students live in hotter places than white students and because heat damages minority students’ achievement more than white students’ achievement," the paper notes.

The big picture: The paper adds another dimension to a thorny problem we wrote about recently — how expansion of air conditioning worldwide provides a major boost in human well-being but also could make global warming even worse thanks to increased energy demand.

  • "Understanding the causal relationship between cumulative heat exposure and learning is of heightened policy relevance in light of accelerating warming in most parts of the world, and given that the overwhelming majority of the world's population does not yet have access to air conditioning," the paper states.

Go deeper

6 hours ago - Politics & Policy

Kellyanne Conway's parting power pointers

Kellyanne Conway addresses the 2020 Republican National Convention. Photo: Nicholas Kamm/AFP via Getty Images

Kellyanne Conway has seen power exercised as a pollster, campaign manager and senior counselor to President Trump. Now that his term in office has concluded, she shared her thoughts with Axios.

Why it matters: If there's a currency in this town, it's power, so we've asked several former Washington power brokers to share their best advice as a new administration and new Congress settle in.

6 hours ago - Politics & Policy

GOP holdouts press on with plans to crush Cheney

Screenshot of emails to a member of Congress from individuals who signed an Americans for Limited Government petition against Rep. Liz Cheney. Photo obtained by Axios

Pro-Trump holdouts in the House are forging ahead with an uphill campaign to oust Rep. Liz Cheney as head of the chamber's Republican caucus even though Minority Leader Kevin McCarthy told them to back down.

Why it matters: What happens next will be a test of McCarthy's party control and the sincerity of his opposition to the movement. Cheney (R-Wyo.) is seen as a potential leadership rival to the California Republican.

Democrats aim to punish House GOP for Capitol riot

Speaker Nancy Pelosi passes through a newly installed metal detector at the House floor entrance Thursday. Photo: Drew Angerer/Getty Images

House Democrats plan to take advantage of corporate efforts to cut funding for Republicans who opposed certifying the 2020 election results, with a plan to target vulnerable members in the pivotal 2022 midterms for their role in the Jan. 6 violence.

Why it matters: It's unclear whether the Democrats' strategy will manifest itself in ads or earned media in the targeted races or just be a stunt to raise money for themselves. But the Capitol violence will be central to the party's messaging as it seeks to maintain its narrow majorities in Congress.