The 35-year-old presidential aide says the campus and its swirl of activity helped guide him from the suburbs of Cleveland to the world of politics.

CNN: AllPolitics - Professor Stephanopoulos

Economics has a number of useful concepts to help guide activity in the real world and this one of a market clearing price is one of them.

FORBES: Big Surprise! Price Caps Cause Shortages!

Meanwhile, a plan will be prepared next year to guide renewable energy development activity in the Pentland Firth and Orkney Waters.

BBC: Wave power proposal for Shader in Lewis shelved

Show Video Clip: Science of Public Opinion and follow up with the discussion questions and activity from the March 21, 2000 CNN NEWSROOM classroom guide.

CNN: The Polls

Local activity provider Ekalis offers two-hour excursions with a local guide.

BBC: Mini guide to activities in the Canary Islands

Facebook has certainly tried to guide the development of its online economy, almost in the way that governments seek to influence economic activity in the real world, through fiscal and monetary policy.

ECONOMIST: Social networks and statehood