Over the last few years I have read a lot of economic and monetary history and assert that ALL periods of rapid economic expansion are driven by two fundamental processes: Reducing the cost of doing work and reducing the cost of information.

FORBES: My Top 10 Economic Worries

The reason is that reducing the cost of work or information has leveraged impact through the entire economy.

FORBES: My Top 10 Economic Worries

The authors suggest another force is also reducing migration: the plummeting cost of information.

ECONOMIST: Free exchange