In economics Keynesian economics, also Keynesianism and Keynesian Theory), is based on the ideas of twentieth-century British economist John Maynard Keynes. The state, according to Keynesian economics, can stimulate economic growth and improve stability in the private sector - through, for example, interest rates, taxation and public projects.http://en.wikipedia.org/wiki/Keynesian_economics
http://en.wikipedia.org/wiki/John_Maynard_Keynes
