If newspapers and magazines begin charging people to read their output, the pirates are likely to turn up, and quickly.

ECONOMIST: The perils of piracy

At some level of output their marginal costs rise as they begin paying overtime or putting their less efficient facilities into production.

FORBES: Blame Antitrust, Not the Weather, For Travel Woes

On borrowing figures, the chancellor said that debt would not begin to fall as a proportion of the country's output until 2016-17, which is a year later than the government's target.

BBC: UK economy 'to contract this year'

Economic output is now growing again, and most economists believe the economy will begin adding jobs by the spring.

ECONOMIST: Small signs of recovery cannot shift the general gloom

This would resolve all these puzzles: GDP growth of 2.5% is above, not at, trend, the output gap is closing, and it was probably smaller than we thought to begin with.

FORBES: In the Long Run it's All Microeconomics

The complaint is that a school's exam "output" largely reflects the abilities of the pupils it takes in from local primary schools to begin with.

BBC: Assessing the value schools add