Although hard to believe, the following ad appeared in the help-wanted section of yesterday's Arizona Republic: Business Columnist Wanted The Arizona Republic, a Gannett newspaper with a circulation of a half-million, has an immediate opening for a business columnist. The ideal candidate will have a journalism degree and at least ten years of experience with a big-city newspaper. It is not necessary to have an in-depth knowledge of economics, finance, statistics or the philosophical, moral and historical foundations of capitalism. Nor does the candidate need to know how to conduct research. It will be a plus, however, if the candidate...