American Institute for Economic Research

American Institute for
Economic Research
AbbreviationAIER
Formation1933 (1933)
FounderEdward C. Harwood
Type501(c)(3) non-profit think tank
04-2121305
PurposeFree market advocacy
Location
President
Samuel Gregg
Revenue$2,222,727 (2019)
Expenses$5,129,945 (2019)
Endowment$184,901,564 in assets (2019)
Websiteaier.org

The American Institute for Economic Research (AIER) is a classical liberal think tank located in Great Barrington, Massachusetts. It was founded in 1933 by Edward C. Harwood, an economist and investment advisor, and is a 501(c)(3) nonprofit. From January 2022 to April 2025 the organization's president was William P. Ruger, who resigned to serve as Deputy Director of National Intelligence for Mission Integration under president Donald Trump. Ruger was succeeded by Samuel Gregg in 2025.

AIER says it supports "personal freedom, free enterprise, property rights, limited government, and sound money".

AIER maintains a global network of local chapters called Harwood Salons (previously called the Bastiat Society).