Yet despite the muddle over what the markers of class are these days, 71% of those polled by YouGov still said they found it very or fairly easy to figure out which class others belong to.

ECONOMIST: Class

Most approved cholesterol-lowering drugs belong to a class of medicines called statins, which work in the liver.

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All three drugs belong to a class of anti-inflammatory drugs called Cox-2 inhibitors, which ease inflammation without causing the gastrointestinal bleeding that can accompany older pain medicines like ibuprofen and aspirin.

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Economists are almost completely useuless in this respect because, like reporters and news editors, they belong to the same class of highly paid professionals.

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The implication is that, unlike Mrs Arroyo and Mr Aquino (both children of presidents), Mr Villar does not belong to a ruling class that buys financial support with political favours, and that he is wealthy enough to rise above the temptations of corruption.

ECONOMIST: Anyone but Arroyo

In recent months, Odinga has made it a priority to reach out to the country's middle class and businessmen, many of whom belong to Kibaki's tribe, the Kikuyu.

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And a group of Democratic pollsters, including Stanley Greenberg and Ruy Teixeira, argued forcefully that the real swing voters in this election are not suburban professionals but the 55% of the population who belong to the white working class.

ECONOMIST: Al Gore, the people��s prince

The justices also questioned whether an arbitrator had the power to bind thousands of absent class members, each of whom had signed their own arbitration agreements, to a class action when they might not want to belong to one.

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Heart side effects have been a looming concern for Cox-2 inhibitors, the class of drugs to which Vioxx, Celebrex, Bextra and Arcoxia belong.

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