You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who was the economics professor who brought the keynesian ideas across the atlantic to the us?" whose answer is John Maynard Keynes.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Keynesian economics introduction to the US
Useful Output:

Doc 1: Keynesian economics is the school of economic thought that government intervention can stabilize the economy.
Doc 2: We have learned that the level of economic activity, for example output, employment, and spending, tends to grow over time.
Doc 3: Medici - will be an introduction to post-Keynesian theory and its applications to global issues regarding  us on: Mailing List: http://eepurl.
Doc 4: Keynesian economics is a macroeconomic theory based on the work of the British economist John Maynard Keynes.
Doc 5: Keynesian economists justify government intervention through public policies that aim to achieve full employment and price stability. The revolutionary idea.