HappySqurriel said:
akuma587 said: There is no economic model than can adequately describe every economic phenomenon. Saying that staglation "disproves Keynsian economics" is extremely short-sighted.
By that logic, the recent economic phenomenon has disproved the assumption that markets are self-regulating, and that businesses act in their own long-term self-interest at all times (which the entire banking sector disproved). So I guess that means that we disproved neoclassical economics. |
Keynsian economics is based on the assumption that you can't have inflationary pressures unless the economy is at capacity and you can therefore spend money with no consequences to bring an economy up to full capacity ... Stagflation demonstrates that an out of control money supply (from too much liquidity or too much government spending) can lead to high inflation even in an economy that is far below capacity.
The current economic crisis disproves nothing because markets were not given an adequate time to correct themself ... People don't ever suggest that markets will self regulate in a timely or clean fashion, just that they will correct themself. In 5 to 10 years the colapse of major players in the financial sector or American automobile manufacturers would have been a distant memory as better managed companies filled the void created by these companies, and produced better products or services at a lower cost.
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You are also assuming that Keynsesian economics hasn't significantly changed, or that anyone even follows traditional Keynseian economics these days:
From Wikipedia:
http://en.wikipedia.org/wiki/New_Keynesian_economics
Two main assumptions define the New Keynesian approach to macroeconomics. Like the New Classical approach, New Keynesian macroeconomic analysis usually assumes that households and firms have rational expectations. But the two schools differ in that New Keynesian analysis usually assumes a variety of market failures. In particular, New Keynesians assume prices and wages are "sticky", which means they do not adjust instantaneously to changes in economic conditions.
Wage and price stickiness, and the other market failures present in New Keynesian models, imply that the economy may fail to attain full employment. Therefore, New Keynesians argue that macroeconomic stabilization by the government (using fiscal policy) or by the central bankefficient macroeconomic outcome than a laissez faire policy would. However, New Keynesian economics is less optimistic about the benefits of activist policies than traditional Keynesian economics was. (using monetary policy) can lead to a more
New Keynesian economists fully agree with New Classical economists that in the long run, changes in the money supply are neutral. However, because prices are sticky in the New Keynesian model, an increase in the money supply (or equivalently, a decrease in the interest rate) does increase output and lower unemployment in the short run.
Nonetheless, New Keynesian economists do not advocate using expansive monetary policy just for short run gains in output and employment, because doing so would raise inflationary expectations and thus store up problems for the future. Instead, they advocate using monetary policy for stabilization. That is, suddenly increasing the money supply just to produce a temporary economic boom is a bad idea (because eliminating the increased inflationary expectations will be impossible without producing a recession). But when the economy is hit by some unexpected external shock, it may be a good idea to offset the macroeconomic effects of the shock with monetary policy. This is especially true if the unexpected shock is one (like a fall in consumer confidence) which tends to lower both output and inflation; in that case, expanding the money supply (lowering interest rates) helps by increasing output while stabilizing inflation and inflationary expectations.
Studies of optimal monetary policy in New Keynesian DSGE models have focused on interest rate rules (especially 'Taylor rules'), specifying how the central bank should adjust the nominal interest rate in response to changes in inflation and output. (More precisely, optimal rules usually react to changes in the output gap, rather than changes in output per se.) In some simple New Keynesian DSGE models, it turns out that stabilizing inflation suffices, because maintaining perfectly stable inflation also stabilizes output and employment to the maximum degree desirable. Blanchard and Galí have called this property the 'divine coincidence'.[13] However, they also show that in models with more than one market imperfection (for example, frictions in adjusting the employment level, as well as sticky prices), there is no longer a 'divine coincidence', and instead there is a tradeoff between stabilizing inflation and stabilizing employment.
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