I'll admit as much as "more coherent" or "more systematic" but "more scientific?" That's like saying one astrologer is more scientific than another.
Jim Devine wrote, "The NAIRU is a more-scientific way to describe what Milton Friedman calls "the natural rate of unemployment." His idea is that the economy gravitates toward the natural rate unless the government or central bank screws things up. Tom Walker 604 254 0470
