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The Phillips curve equation can be derived from the (short-run) Lucas aggregate supply function. The Lucas approach is very different from that of the traditional view. Instead of starting with empirical data, he started with a classical economic model following very simple economic principles. Start with the aggregate supply function:
The book further popularized his "expectations-augmented Phillips curve" and introduced the concept of hysteresis with regard to unemployment (prolonged unemployment is partially irreversible as workers lose skill and become demoralized).
This exhibits a Phillips curve relationship, as inflation is positively related with output (i.e. inflation is negatively related with unemployment). However, and this is the point, the existence of a short-run Phillips curve does not make the central bank capable of exploiting this relationship in a systematic way.
The Phillips curve appeared to reflect a clear, inverse relationship between inflation and output. The curve broke down in the 1970s as economies suffered simultaneous economic stagnation and inflation known as stagflation. The empirical implosion of the Phillips curve followed attacks mounted on theoretical grounds by Friedman and Edmund ...
Joseph Eugene Stiglitz (/ ˈ s t ɪ ɡ l ɪ t s /; born February 9, 1943) is an American New Keynesian economist, [2] a public policy analyst, political activist, and a professor at Columbia University.
The New Keynesian Phillips curve was originally derived by Roberts in 1995, [48] and has since been used in most state-of-the-art New Keynesian DSGE models. [49] The new Keynesian Phillips curve says that this period's inflation depends on current output and the expectations of next period's inflation.
Former presidential candidate Dean Phillips will receive at least three of Ohio's delegates to the Democratic National Convention even though he has dropped out of the race and endorsed President ...
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