The Globe quotes Dan Ciuriak, former deputy chief economist at Foreign Affairs and International Trade (Canada), who said one of the flaws of exchange rate orthodoxy is that currencies don't actually float, they fluctuate."We're purists in a non-pure world,' explained Mr. Ciuriak, now an Ottawa-based conculting economist. 'We ought to be interventionists....Firm by firm we are destroying our export market (as the Canadian dollar rises) ' he said.'Companies invest all this money to establish a presence in export markets and then they get driven out.'