Data and Code for: Clean Identification? The Effects of the Clean Air Act on Air Pollution, Exposure Disparities and House Prices

Principal Investigator(s): View help for Principal Investigator(s) Lutz Sager, Georgetown University; Gregor Singer, London School of Economics

Version: View help for Version V1

Name	File Type	Size	Last Modified
_subroutines			09/20/2023 10:42:AM
0_1_import_di_prep.R	text/x-rsrc	1 KB	09/20/2023 06:42:AM
0_2_intersect_raw_pollution_with_blocks.m	text/x-objcsrc	345 bytes	09/08/2023 08:43:AM
0_3_import_pollution.do	text/plain	6.8 KB	06/15/2023 08:02:AM
0_main.do	text/plain	2.5 KB	09/08/2023 09:13:AM
1_import_and_prepare_data.do	text/plain	10.9 KB	01/03/2024 11:52:PM
2a_Figures.do	text/plain	59.3 KB	09/18/2023 02:53:AM
2b_Tables_Fig7.do	text/plain	131.9 KB	09/18/2023 02:57:AM
2c_FigA1a_FigA18b.do	text/plain	4.1 KB	09/18/2023 02:57:AM
2d Fig8_TabA11.do	text/plain	7.3 KB	09/18/2023 02:57:AM

Project Description

Summary: We assess the US Clean Air Act standards for fine particulate matter (PM2.5). Using high-resolution data, we find that the 2005 regulation reduced PM2.5 levels by 0.4μg/m^3 over five years, with larger effects in more polluted areas. Standard difference-in-differences overstates these effects by a factor of three because time trends differ by baseline pollution, a bias we overcome with three alternative approaches. We show that the regulation contributed to narrowing Urban-Rural and Black-White PM2.5 exposure disparities, but less than difference-in-differences suggest. Pollution damages capitalized into house prices, on the other hand, appear larger than previously thought when leveraging regulatory variation.

Scope of Project

JEL Classification:
      Q52 Pollution Control Adoption and Costs; Distributional Effects; Employment Effects
      Q53 Air Pollution; Water Pollution; Noise; Hazardous Waste; Solid Waste; Recycling
      Q58 Environmental Economics: Government Policy

Geographic Coverage: United States

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Published Versions

V1 [2025-01-15]

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