In microeconomics, excess demand is a phenomenon where the demand for goods and services exceeds that which the firms can produce. In microeconomics, an excess demand function is a function expressing excess demand for a product—the excess of quantity demanded over quantity supplied—in terms of the product's price and possibly other determinants. It is the product's demand function minus its supply function. In a pure exchange economy, the excess demand is the sum of all agents' demands minus the sum of all agents' initial endowments.
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| - Überschussnachfragefunktion (de)
- Excess demand function (en)
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| - Als Überschussnachfragefunktion bezeichnet man in der Volkswirtschaftslehre eine mathematische Funktion zur Beschreibung eines Marktes. Sie gibt für einen gegebenen Haushalt an, um wie viel seine Nachfrage nach jedem Gut seine ursprüngliche Ausstattung mit dem jeweiligen Gut übersteigt (individuelle Überschussnachfragefunktion). (de)
- In microeconomics, excess demand is a phenomenon where the demand for goods and services exceeds that which the firms can produce. In microeconomics, an excess demand function is a function expressing excess demand for a product—the excess of quantity demanded over quantity supplied—in terms of the product's price and possibly other determinants. It is the product's demand function minus its supply function. In a pure exchange economy, the excess demand is the sum of all agents' demands minus the sum of all agents' initial endowments. (en)
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| - Als Überschussnachfragefunktion bezeichnet man in der Volkswirtschaftslehre eine mathematische Funktion zur Beschreibung eines Marktes. Sie gibt für einen gegebenen Haushalt an, um wie viel seine Nachfrage nach jedem Gut seine ursprüngliche Ausstattung mit dem jeweiligen Gut übersteigt (individuelle Überschussnachfragefunktion). (de)
- In microeconomics, excess demand is a phenomenon where the demand for goods and services exceeds that which the firms can produce. In microeconomics, an excess demand function is a function expressing excess demand for a product—the excess of quantity demanded over quantity supplied—in terms of the product's price and possibly other determinants. It is the product's demand function minus its supply function. In a pure exchange economy, the excess demand is the sum of all agents' demands minus the sum of all agents' initial endowments. A product's excess supply function is the negative of the excess demand function—it is the product's supply function minus its demand function. In most cases the first derivative of excess demand with respect to price is negative, meaning that a higher price leads to lower excess demand. The price of the product is said to be the equilibrium price if it is such that the value of the excess demand function is zero: that is, when the market is in equilibrium, meaning that the quantity supplied equals the quantity demanded. In this situation it is said that the market clears. If the price is higher than the equilibrium price, excess demand will normally be negative, meaning that there is a surplus (positive excess supply) of the product, and not all of it being offered to the marketplace is being sold. If the price is lower than the equilibrium price, excess demand will normally be positive, meaning that there is a shortage. Walras' law implies that, for every price vector, the price–weighted total excess demand is 0, whether or not the economy is in general equilibrium. This implies that if there is excess demand for one commodity, there must be excess supply for another commodity. (en)
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