The VVD, for example, is campaigning on a promise to limit the flow of unskilled immigrants into the country and to restrict newcomers' access to social services.

ECONOMIST: The Dutch election

Because ideas can flow so freely, efforts to limit distribution raise challenging enforcement obstacles.

FORBES: The Twilight of Copyright?

The main issue is that it relies on drivers themselves sticking to the new limit to smooth traffic flow.

BBC: Will a borough-wide 20mph speed limit work?

The rich world's bank bail-outs may limit the squeeze, but the flow of capital to the emerging world will slow.

ECONOMIST: The financial crisis

While controlling the flow of information can protect your data it can also limit your ability to do business.

FORBES: Wikileaks' Positive Side Effect for IT

The US federal government has responded to the Chesapeake Bay challenge by imposing a limit on the amount of pollutants that can flow into the Bay and letting states set up credit-trading programs to promote the most efficient reductions possible.

FORBES: Emerging Platforms Support Water Trading Around the World

Think about what this advancement has meant just in terms of access to the resources: When drilling into a hydrocarbon bearing formation 100 feet thick, vertical drilling would allow an operator to contact 100 feet of rock, which would limit your potential recovery to whatever oil or gas would flow into that length of pipe.

FORBES: Horizontal Drilling: A Technological Marvel Ignored

The flow into Europe is not, however, determined solely by the effectiveness of measures taken to limit it.

ECONOMIST: Sometimes what does not happen is the real news