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OLIGOPSONY: A market structure dominated by a small number of large buyers controlling the buying-side of a market. Oligopsony is the somewhat obscure and seldom discussed buying counterpart to an oligopoly seller that controls the selling side of a market. Whereas oligopoly is most relevant to product markets, oligopsony is most relevant to factor markets.

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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 looking for a downtown retail store seeking to buy either super soft, super cuddly, stuffed animals or a large stuffed brown and white teddy bear. Be on the lookout for neighborhood pets, especially belligerent parrots.
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John Maynard Keynes was born the same year Karl Marx died.
"The only profit center is the customer."

-- Peter Drucker, educator

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Journal of Economic History
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