Baseball players or cricketers do not need to be able to solve explicitly the non-linear differential equations which govern the flight of the ball. They just catch it.
Paul OrmerodIn most Western economies, the general relationship is not in fact between the rate of inflation and the level of unemployment, but between the rate of change of inflation and the rate of change of unemployment.
Paul OrmerodMany Europeans, while admiring the strength and power of the American economy, undoubtedly feel that the system of social values which prevails in the United States, manifested in the acute problems evident in the inner cities and the level of violent crime, for example, leaves much to be desired.
Paul Ormerod