In one recent commentary in the Journal of the National Cancer Institute, University of Toronto oncologist Ian Tannock argued that a three month survival difference is the minimum clinically meaningful difference for most solid tumors.

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Every year the winter maximum gets higher, as does the summer minimum but the difference between annual maximum and minimum increases.

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Also the difference between the minimum and maximum is 9.1 degrees F.

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In theory, we can expect people to invest the difference between the minimum wage and the minimum they would be willing too accept in a job search.

FORBES: Should We Care About the Minimum Wage?

Clearly, a 90 cent minimum wage would make no darn difference to anyone. 6 year olds get more than that these days for tidying their rooms.

FORBES: Greg Mankiw's Excellent Question: Why a $9 Minimum Wage? Why Not $90? Or 90 cents?

While the legislation is under way for these Contracts for Difference (effectively guaranteed minimum prices set at different rates for different technologies), the prices are not yet out.

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The OECD highlights that Mr Cardoso's reforms of school funding in the 1990s, which mandated minimum per-pupil spending and teacher salaries, made a huge difference in the poorest areas.

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