The vast tax subsidies for housing encourage over-investment in property rather than other, more productive, assets.

ECONOMIST: Tax reform

Overall, U.S. industry has become among the most productive in the world--output has doubled over the past 25 years, and productivity has grown at a rate twice that of the rest of the economy.

FORBES: Magazine Article

The ban is over-inclusive because many people recover from mental illness and lead healthy and productive lives.

FORBES: Move up http://i.forbesimg.com t Move down

And now, despite the fact that the strategy over the last two years has failed, and has proved completely counter-productive, Greece is being asked to impose further very very deep cuts in public spending.

BBC: Should we feel sorry for Greece?

These calcified deposits can grow to enormous sizes over long periods of time and form coral reefs -- one of the world's most productive ecosystems, which can harbor more than 4, 000 species of fish and many other marine life forms.

CNN: Report: Coral almost as genetically complex as humans

If the euro area lifted its employment ratio to American levels gradually over a 20-year period, this would raise the annual growth rate of the region's productive potential by almost 1%.

ECONOMIST: Wo ist Goldilocks?