Mr Bresnahan argues, on the contrary, that this pattern of innovation is going to persist.

ECONOMIST: Economics focus

Mr Bresnahan's answer is that it raised the demand for two kinds of worker neither of them knowledge workers in the Reichian sense.

ECONOMIST: Economics focus

PCs as a way to improve the productivity of individual workers, Mr Bresnahan sees computing as an agent of revolution in whole organisations.

ECONOMIST: Economics focus

According to John Bresnahan and Jake Sherman of Politico, however, Congress is seeking to wipe out these provisions and put members and staffers back onto FEHBP.

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Indeed, if Mr Bresnahan is right, economists' standard ways of categorising workers according to skill are wrong: there is more (or less) to it than education and training, narrowly defined.

ECONOMIST: Economics focus