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Shephard's lemma is a result in microeconomics having applications in the theory of the firm and in consumer choice. [1] The lemma states that if indifference curves of the expenditure or cost function are convex, then the cost-minimizing point of a given good with price is unique.
All superlative indices produce similar results and are generally the favored formulas for calculating price indices. [14] A superlative index is defined technically as "an index that is exact for a flexible functional form that can provide a second-order approximation to other twice-differentiable functions around the same point."
The Curriculum Open-Access Resources in Economics Project (CORE Econ) is an organisation that creates and distributes open-access teaching material on economics.The goal is to make teaching material and reform the economics curriculum. [1]
Against this view, one could also argue that the physical amounts of comparable resources (such as energy, land, water, etc.), necessary to manufacture a car, are much larger than resources necessary for growing a carrot, explaining why the cost (and, hence, minimal price) of a car is larger than the cost of a carrot. In other words, it is the ...
It was the bestselling economics textbook for many decades and still remains popular, selling over 300,000 copies of each edition from 1961 through 1976. [1] The book has been translated into forty-one languages and in total has sold over four million copies. Economics was written entirely by Samuelson until the 12th edition (2001). Newer ...
The average price per unit can be driven upward by a rise in unit prices, or by an increase in the unit shares of higher-priced SKUs, or by a combination of the two. An 'average' price metric that is not sensitive to changes in SKU shares is the price per statistical unit. [1] Price per statistical unit
Roy's identity reformulates Shephard's lemma in order to get a Marshallian demand function for an individual and a good from some indirect utility function.. The first step is to consider the trivial identity obtained by substituting the expenditure function for wealth or income in the indirect utility function (,), at a utility of :
The book showed how operationally meaningful theorems can be described with a small number of analogous methods, thus providing "a general theory of economic theories." It moved mathematics out of the appendices (as in John R. Hicks's Value and Capital ) and helped change how standard economic analysis across subjects could be done with the ...