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The Lucas islands model is an economic model of the link between money supply and price and output changes in a simplified economy using rational expectations.It delivered a new classical explanation of the Phillips curve relationship between unemployment and inflation.
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 MP curve displays a positive relationship, upward-sloping curve, where the real interest rate is located on the vertical axis and inflation rate on the horizontal axis. Shifts on the MP curve are produced by actions of the Federal Reserve .
In 2002, Mankiw and Ricardo Reis proposed an alternative to the widely-used New Keynesian Phillips curve that is based on the slow diffusion of information among the population of price setters. Their sticky-information model displays three related properties that are more consistent with accepted views about the effects of monetary policy.
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.
Demand-pull inflation occurs when aggregate demand in an economy is more than aggregate supply.It involves inflation rising as real gross domestic product rises and unemployment falls, as the economy moves along the Phillips curve.
The dynamic AS curve slopes upward, reflecting the mechanisms of the Phillips curve: Other things equal, higher levels of activity reflect higher increases in wages and other marginal costs of production, causing higher inflation through the firms' price-setting mechanisms [3]: 263 [5]: 409 as they induce firms to raise their prices at a higher ...
In macroeconomics, the triangle model employed by new Keynesian economics is a model of inflation derived from the Phillips Curve and given its name by Robert J. Gordon.The model views inflation as having three root causes: built-in inflation, demand-pull inflation, and cost-push inflation. [1]