Originally posted by jacobdcoates
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For background, we recommend two articles on the subject by Mike Moffatt at About.com.
Cost-Push Inflation vs. Demand-Pull Inflation
What is deflation and how can it be prevented?
There are four variables at work that determine inflation rates:
1. The supply of money
2. The supply of other goods
3. Demand for money
4. Demand for goods
Below we offer the simple case of an economy growing in balance with 100 units each of goods supply/demand and money supply/demand resulting in an inflation rate of 3.3%.
Our model is designed to show the relationship between changes in the four factors of inflation, not the actual extent of changes in inflation relative to the factors within the US economy during economic contraction. In other words, a 10% increase in the broad money supply in the model may cause inflation to rise more or less than 0.4%. The actual extent of inflation responses to inflation factors depends on many factors of the US economy and monetary system that are too complex for our super simple model.
We break our scenarios up into two series: Growth Cases and Contraction Steps.
Four Growth Cases, we demonstrate the relationship between the four variables by increasing one while holding the others constant.
Growth Case 1: Raising goods supply causes inflation to fall
Growth Case 2: Raising goods demand causes inflation to rise
Growth Case 3: Raising money supply causes inflation to rise
Growth Case 4: Raising money demand causes inflation to fall

Walking through the Contraction Steps, we start with both goods supply and demand, and money supply falling equally as money demand falls even more. The result is a moderate increase in inflation.
Step 5 is the circumstance of very high goods supply (over-capacity) combined with a severe 50% decline in demand, a severe 50% decline in the money supply, and a doubling in demand for money. The result is that inflation falls to 1.1%. In real life, of course, such drastic reductions in goods demand and the money supply will likely have a much more severe impact on inflation. Again, the idea is to show the relationships.
For a real life example, when we last interviewed Jim Rogers a few months ago when oil was at $100, we asked him why falling demand was not going to push down prices. He replied, "You are assuming that producers are going to maintain supply. They will cut supply to maintain prices, and that will continue to drive inflation for the US or any country tied to the dollar. They are not going to exchange precious oil for weak dollars."

Relationship among prices of imported and non-imported goods and services.
What happens as the dollar weakens and the dollar price of US imports rises? Think back to when TVs and apparel were more expensive. What did we do? We bought fewer of them, that's what. Life goes on.
On the weak dollar, just because we are willing to pay each other $230,000 for a house that was thrown together in a few days doesn't mean a European is willing to pay as much. In fact, they are paying about $120,000. When it comes to oil, we don't get to decide how much the oil costs in dollars, the suppliers do.



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