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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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PROCESS INNOVATION An innovation that is an improvement in an existing product, technology, or idea or an improvement in the way a product, technology, or idea is produced. The contrast is with a product innovation, which is an innovation of a new product, technology, or idea that generates a beneficial improvement in society and the economy; one that is fundamentally different from existing products, technologies, or ideas.
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A half gallon milk jug holds about $50 in pennies.
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"No great performance ever came from holding back. " -- Don Greene, motivational coach, former Green Beret
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JEP
Journal of Economic Perspectives
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