[link|http://en.wikipedia.org/wiki/Phillips_curve|http://en.wikipedia....ki/Phillips_curve]
It is a relatioship between inflation and unemployment, not supply and demand.
The reason why it got out of wack in the 1970's and 1980's, etc was that there were other factors it did not deal with like technology that threw it out of wack.
In mainstream economics there are two types, the classicals and the keynesians.
Classicals, are very supply side oriented. They believe in a hands off the economy by the government, they feel the market can work out any problems by itself. They focus on the long run, and follow Says law. They try to promote growth, and encourage savings. They feel inflation is bad, and that unemployment is over-rated.
Keynesians, are very demand side oriented. The believe that the government should control things, or the markets will get out of hand. They feel a little inlfation is fine. They try to have small deficits if any. They focus on the short run. They do not think that people should save, and that saving does not stimulate the economy. They believe in POT (Paradox Of Thrift) which says that if the supply side is given tax cuts, they would save it rather than spend it or create jobs with it. They believe that unemployment is understated, and many more people should be counted in it.
Marx, in my opinion, was a madman. The failure of Russia is a prime example of why socialism does not work in the real world. Labor does not have to move to where Captial is, labor can be anywhere, even India, and the Capital can be elsewhere. Also the workers never did rise up and overthrow the US government as Marx had predicted. Marx had many other things wrong, but it is getting late, and my knowledge of Marxism is limited.
Pop-quiz hotshot:
Are Republicans following the Classic or Keynesian economic theory?
The Republicans use Reaganomics, yet Reaganomics failed to produce the Laffer curve as promised. Why was this?
Explain the way Reaganomics works. What are the Principles that Reaganomic followers believe?
Most Republicn fiscal policies tend to create a deficit, is this good or bad and why? Where does the government get the money from when it goes into debt?
Name the four types of Unemployment studied in macro and micro economics.
What is the formula behind Quanity Theory?
Describe the difference between Classical and Keynesian economics.