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LERNER INDEX: The difference between price (p) and marginal cost (mc) as a fraction of price, that is [p-mc]/p. The Lerner index is usually taken as an indicator of market power because the larger the index, the larger the difference between price and marginal cost, that is, the larger the distance between the price and the competitive price. The Lerner index depends on the elasticity of demand. The Lerner index is also called the price-cost margin.

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ATTRACTIVE FORCE: A force that causes activities to locate closer together. One primary attractive force is transportation cost and the weight of an activity. In this case, activities locate close together to reduce transportation cost. Another is agglomeration and urban economies. In this case, activities locate close together to lower other production cost. Attractive forces are countered by dispersive forces, which act to force activities farther apart.

     See also | weight | transportation | weight gaining | weight losing | agglomeration economies | urbanization economies | competition along a line | location theory | dispersive force |


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INCOME EFFECT

The change in quantity demanded that results because a change in the demand price of a good affects real income (that is, the purchasing power of income) even though nominal income remains the same. This is one of two reasons, or effects, underlying the law of demand and the negative slope of the market demand curve. The other is the substitution effect.

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Today, you are likely to spend a great deal of time wandering around the shopping mall seeking to buy either a package of 4 by 6 index cards, the ones with lines or a 50 foot extension cord. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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The portion of aggregate output U.S. citizens pay in taxes (30%) is less than the other six leading industrialized nations -- Britain, Canada, France, Germany, Italy, or Japan.
"There is at least one point in the history of any company when you have to change dramatically to rise to the next level of performance. Miss that moment, and you start to decline. "

-- Andy Grove, Intel Corp. chairman

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