Share this page!

Enter URL or ID to Unroll

You can paste full URL like: https://x.com/threadreaderapp/status/1644127596119195649
or just the ID like: 1644127596119195649

How to get URL link on X (Twitter) App

  1. On the Twitter thread, click on or icon on the bottom
  2. Click again on or Share Via icon
  3. Click on Copy Link to Tweet
  4. Paste it above and click "Unroll Thread"!
  5. More info at Twitter Help
Robert Metcalfe Profile picture
Robert Metcalfe
@RDMetcalfe
Economist, professor @ColumbiaSIPA @nberpubs | Co-Editor @jpubecon | Chief Economist @CentreNetZero | Co-founder @tbehaviouralist & @signol_io | 🏴󠁧󠁢󠁷󠁬󠁳󠁿
Feb 25, 2025 • 9 tweets • 4 min read
We just released our paper using a field experiment to reveal indoor air pollution (IAP) in London: It’s worse than you think!

🧵with five main results👇

With @Sefi_Roth_

@ColumbiaSIPA @LSEGeography @GRI_LSE Image 1. IAP is often worse than outdoor pollution—especially when people are actually at home. 38% of the time, IAP exceeds WHO standards. Yet, indoor pollution gets far less attention than outdoor air quality. Image
Image
Sep 5, 2022 • 8 tweets • 4 min read
New @nberpubs working paper out today:

"Race and Redistribution in the United States: An Experimental Analysis"

nber.org/papers/w30426

with @jesper_akesson, Bob Hahn, & Itzhak Rasooly

#econtwitter Motivation: Many observational studies suggest that people's (incorrect) beliefs about welfare recipients being disproportionately Black limit their support for related spending.

In our paper, we test this hypothesis using the tools of randomized inference.