The American Recovery and Reinvestment Act of 2009 is known for its adherence to Keynesian supply-side economics.
Keynesian supply-side economics:
The American Recovery and Reinvestment Act that was passed in 2009 after the Great Recession was aimed at increasing demand in the economy so that the U.S. would recover from the economic slump it was in.
In conclusion, this showed the Keynesian supply-side economics.
Find out more on the Great Recession at https://brainly.com/question/4458848.