So adding business-collaboration tools to Facebook would make sense. (Dustin Moskovitz, one of Facebook's co-founders, has just raised funding for a new business-collaboration start-up called Asana.) Some bosses regard social networking as the epitome of online time-wasting.

ECONOMIST: Monitor

Dr Gillespie cites evidence from the Small Business Survey carried out last year, showing 46% of new-start business owners were motivated to start up a business because they could see a market opportunity.

BBC: Behind the Budget challenge

When an entrepreneur can start a new business, it creates jobs in their country, but also opens up new markets for our country.

WHITEHOUSE: President Obama Nominates Jim Yong Kim for World Bank President | The White House