They may be taught the basics of interest rates as a mathematical principle, but applied economics is a topic often left until high school for study.

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He understood American power, in all its complexity, and believed that when it is applied with purpose and principle, it can tip the scales of history.

WHITEHOUSE: Remembering Richard Holbrooke

Instead, the court applied the long-standing principle that it is the origin of the claim, rather than the consequences to the taxpayer from a failure to defeat the claim, that drives whether a settlement payment is a deductible business expense.

FORBES: Tax Court: Corporation's $2.3 Million Settlement Payment For Wrongful Death Of Shareholder's Girlfriend Was Not A "Business Expense"

The paper believes the principle that "transparency is the best disinfectant" should now be applied to every public service.

BBC: Newspaper review: Press react to new Pope Francis

The UK and Sweden, while not opposed to the tax in principle, have both warned that it makes little sense unless it is applied globally, as investors will simply move their trading activity to a different country in order to avoid paying it.

BBC: Financial transactions tax in Europe given go-ahead

She emphasized that in situ preservation is a logical procedure and a basic principle to deal with various risks at underwater sites whenever a scientific approach is not applied to interventions.

UNESCO: Underwater Cultural Heritage