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ARBITRAGE: Buying something in one market then immediately (or as soon as possible) selling it in another market for (hopefully) a higher price. Arbitrage is a common practice in financial markets. For example, an aspiring financial tycoon might buy a million dollars worth of Japanese yen in the Tokyo foreign exchange market then resell it immediately in the New York foreign exchange market for more than a million dollars. Arbitrage of this sort does two things. First, it often makes arbitragers wealthy. Second, it reduces or eliminates price differences that exist between two markets for the same good.

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SAVING-INVESTMENT MODEL

A variation of the Keynesian injections-leakages model that includes the two private sectors, the household sector and the business sector. This variation, more formally termed the two-sector injections-leakages model, captures the interaction between induced saving (and indirectly induced consumption expenditures) and autonomous investment expenditures. This model provides an alternative to the two-sector aggregate expenditures (Keynesian cross) analysis of the macroeconomy, including equilibrium, disequilibrium, and the multiplier. Equilibrium is identified as the intersection between the saving line and the investment line. Two related variations are the three-sector injections-leakages model and the four-sector injections-leakages model.

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Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either a T-shirt commemorating Thor Heyerdahl's Pacific crossing aboard the Kon-Tiki or a wall poster commemorating the 2000 Olympics. Be on the lookout for telephone calls from former employers.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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