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economic cost
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economic cost as the payment that must be made to obtain and retain the services of a resource. It is the income the firm must provide to resource suppliers to attract resources away from alternative uses.
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explicit cost
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The monetary payment made by a firm to an outsider to obtain a resource.
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implicit cost
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The monetary income a firm sacrifices when it uses a resource it owns rather than supplying the resource in the market; equal to what the resource could have earned in the best-paying alternative employment; includes a normal profit.
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Economic costs
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Economic costs = Explicit costs + Implicit costs
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accounting profit
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The total revenue of a firm less its explicit costs; the profit (or net income) that appears on accounting statements and that is reported to the government for tax purposes. Total sales revenue - total (explicit) costs
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normal profit
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The payment made by a firm to obtain and retain entrepreneurial ability; the minimum income that entrepreneurial ability must receive to induce entrepreneurs to provide their entrepreneurial ability to a firm; the level of accounting profit at which a firm generates an economic profit of zero after paying for entrepreneurial ability.
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economic profit
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The return flowing to those who provide the economy with the economic resource of entrepreneurial ability; the total revenue of a firm less its economic costs (which include both explicit costs and implicit costs); also called "pure profit" and "above-normal profit."
Economic Profit = Revenue − Explicit Costs − Implicit Costs.
Economic Profit = Revenue − Explicit Costs − Implicit Costs.
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short run
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In microeconomics, a period of time in which producers are able to change the quantities of some but not all of the resources they employ; a period in which some resources (usually plant) are fixed and some are variable. (fixed plant)
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long run
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In microeconomics, a period of time long enough to enable producers of a product to change the quantities of all the resources they employ, so that all resources and costs are variable and no resources or costs are fixed (variable plant)
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total product (TP)
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The total output of a particular good or service produced by a firm (or a group of firms or the entire economy).
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marginal product (MP)
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The additional output produced when 1 additional unit of a resource is employed (the quantity of all other resources employed remaining constant); equal to the change in total product divided by the change in the quantity of a resource employed.
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average product
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(AP) The total output produced per unit of a resource employed (total product divided by the quantity of that employed resource).
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law of diminishing returns
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The principle that as successive increments of a variable resource are added to a fixed resource, the marginal product of the variable resource will eventually decrease.
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Fixed Cost
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Any cost that in total does not change when the firm changes its output. Rent payments, interest on a firm's debts, and insurance premiums are generally fixed costs; they do not change even if a firm produces more.
Fixed costs are beyond the business manager's current control; they are incurred in the short run and must be paid regardless of output level.
Fixed costs are beyond the business manager's current control; they are incurred in the short run and must be paid regardless of output level.
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Variable cost
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A cost that increases when the firm increases its output and decreases when the firm reduces its output. They include payments for materials, fuel, power, transportation services, and most labor.
can be controlled or altered in the short run by changing production levels.
can be controlled or altered in the short run by changing production levels.
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total cost
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is the sum of total fixed cost and total variable cost at each level of output:
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Average fixed cost (AFC)
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for any output level is found by dividing total fixed cost (TFC) by that amount of output (Q).
That is,
average fixed cost (AFC) A firm's total fixed cost divided by output (the quantity of product produced).
That is,
average fixed cost (AFC) A firm's total fixed cost divided by output (the quantity of product produced).
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average variable cost (AVC)
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A firm's total variable cost divided by output (the quantity of product produced).
(AVC) for any output level is calculated by dividing total variable cost (TVC) by that amount of output (Q):
(AVC) for any output level is calculated by dividing total variable cost (TVC) by that amount of output (Q):
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average total cost (ATC)
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A firm's total cost divided by output (the quantity of product produced); equal to average fixed cost plus average variable cost.
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marginal cost (MC)
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The extra (additional) cost of producing 1 more unit of output; equal to the change in total cost divided by the change in output (and, in the short run, to the change in total variable cost divided by the change in output).
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economies of scale
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The situation when a firm's average total cost of producing a product decreases in the long run as the firm increases the size of its plant (and, hence, its output).
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Diseconomies of Scale
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In time the expansion of a firm may lead to diseconomies and therefore higher average total costs.
The situation when a firm's average total cost of producing a product increases in the long run as the firm increases the size of its plant (and, hence, its output).
The situation when a firm's average total cost of producing a product increases in the long run as the firm increases the size of its plant (and, hence, its output).
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constant returns to scale
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The situation when a firm's average total cost of producing a product remains unchanged in the long run as the firm varies the size of its plant (and, hence, its output).
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minimum efficient scale (MES)
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The lowest level of output at which a firm can minimize long-run average total cost.
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natural monopoly
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An industry in which economies of scale are so great that a single firm can produce the industry's product at a lower average total cost than would be possible if more than one firm produced the product.
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Entry and exit only
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The only long-run adjustment in our graphical analysis is caused by firms' entry or exit. Moreover, we ignore all short-run adjustments in order to concentrate on the effects of the long-run adjustments.
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Identical costs
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All firms in the industry have identical cost curves. This assumption lets us discuss an "average," or "representative," firm, knowing that all other firms in the industry are similarly affected by any long-run adjustments.
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Constant-cost industry
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The industry is a constant-cost industry. That is, the entry and exit of firms do not affect resource prices or, consequently, the individual firms' ATC curves.
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long-run supply
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A schedule or curve showing the prices at which a purely competitive industry will make various quantities of the product available in the long run.
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constant-cost industry
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An industry in which the entry and exit of firms have no effect on the prices firms in the industry must pay for resources and thus no effect on production costs.
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increasing-cost industry
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An industry in which expansion through the entry of new firms raises the prices firms in the industry must pay for resources and therefore increases their production costs.
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decreasing-cost industry
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An industry in which expansion through the entry of firms lowers the prices that firms in the industry must pay for resources and therefore decreases their production costs.
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productive efficiency
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The production of a good in the least costly way; occurs when production takes place at the output level at which per-unit production costs are minimized.
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allocative efficiency
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The apportionment of resources among firms and industries to obtain the production of the products most wanted by society (consumers); the output of each product at which its marginal cost and price or marginal benefit are equal, and at which the sum of consumer surplus and producer surplus is maximized.
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consumer surplus
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The difference between the maximum price a consumer is (or consumers are) willing to pay for an additional unit of a product and its market price; the triangular area below the demand curve and above the market price.
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producer surplus
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The difference between the actual price a producer receives (or producers receive) and the minimum acceptable price; the triangular area above the supply curve and below the market price.
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creative destruction
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The hypothesis that the creation of new products and production methods destroys the market power of existing monopolies.
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pure monopoly
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A market structure in which one firm sells a unique product, into which entry is blocked, in which the single firm has considerable control over product price, and in which nonprice competition may or may not be found.
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Single seller
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In a pure, or absolute, monopoly, a single firm is the sole producer of a specific good or the sole supplier of a service; the firm and the industry are synonymous.
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No close substitutes
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A pure monopoly's product is unique in that there are no close substitutes. The consumer who chooses not to buy the monopolized product must do without it.
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Price maker
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The pure monopolist controls the total quantity supplied and thus has considerable control over price; it is a price maker (unlike a pure competitor, which has no such control and therefore is a price taker). The pure monopolist confronts the usual downward sloping product demand curve. It can change its product price by changing the quantity of the product it produces. The monopolist will use this power whenever it is advantageous to do so.Page 229
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Blocked entry
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A pure monopolist has no immediate competitors because certain barriers keep potential competitors from entering the industry. Those barriers may be economic, technological, legal, or of some other type.
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Nonprice competition
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The product produced by a pure monopolist may be either standardized (as with natural gas and electricity) or differentiated (as with the Windows operating system or Frisbees). Monopolists that have standardized products engage mainly in public relations advertising, whereas those with differentiated products sometimes advertise their products' attributes.
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barrier to entry
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Anything that artificially prevents the entry of firms into an industry.
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Patents
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A patent is the exclusive right of an inventor to use, or to allow another to use, her or his invention
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simultaneous consumption
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The same-time derivation of utility from some product by a large number of consumers.
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network effects Increases in the value of a product to each user, including existing users, as the total number of users rises.
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Increases in the value of a product to each user, including existing users, as the total number of users rises.
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X-Inefficiency
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In constructing all the average-total-cost curves used in this book, we have assumed that the firm uses the most efficient existing technology. This assumption is natural because firms cannot maximize profits unless they are minimizing costs. X-inefficiency occurs when a firm produces output at a higher cost than is necessary to produce it.Page 240
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X-inefficiency
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The production of output, whatever its level, at a higher average (and total) cost than is necessary for producing that level of output.
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rent-seeking behavior
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Attempts by individuals, firms, or unions to use political influence to receive payments in excess of the minimum amount they would normally be willing to accept to provide a particular good or service.
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price discrimination
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The selling of a product to different buyers at different prices when the price differences are not justified by differences in cost.
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socially optimal price
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The price of a product that results in the most efficient allocation of an economy's resources and that is equal to the marginal cost of the product.
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fair-return price
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For natural monopolies subject to rate (price) regulation, the price that would allow the regulated monopoly to earn a normal profit; a price equal to average total cost.
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oligopoly
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A market structure in which a few firms sell either a standardized or differentiated product, into which entry is difficult, in which the firm has limited control over product price because of mutual interdependence (except when there is collusion among firms), and in which there is typically nonprice competition.
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homogeneous oligopoly
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An oligopoly in which firms produce a standardized product.
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differentiated oligopoly
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An oligopoly in which firms produce a differentiated product.
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strategic behavior
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Self-interested economic actions that take into account the expected reactions of others.
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mutual interdependence
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A situation in which a change in price strategy (or in some other strategy) by one firm will affect the sales and profits of another firm (or other firms). Any firm that makes such a change can expect its rivals to react to the change.
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game theory
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The study of how people behave in strategic situations in which individuals must take into account not only their own possible actions but also the possible reactions of others. Originally developed to analyze the best ways to play games like poker and chess.
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prisoner's dilemma
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A famous game analyzed in game theory in which two players who could have reached a mutually beneficial outcome through cooperation will instead end up at a mutually inferior outcome as they pursue their own respective interests (instead of cooperating). Helps to explain why collusion can be difficult for oligopoly firms to achieve or maintain.
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collusion
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A situation in which firms act together and in agreement (collude) to fix prices, divide a market, or otherwise restrict competition.
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kinked-demand curve
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A demand curve that has a flatter slope above the current price than below the current price. Applies to a noncollusive oligopoly firm if its rivals will match any price decrease but ignore any price increase.
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price war
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Successive, competitive, and continued decreases in the prices charged by firms in an oligopolistic industry. At each stage of the price war, one firm lowers its price below its rivals' price, hoping to increase its sales and revenues at its rivals' expense. The war ends when the price decreases cease.
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cartel
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A formal agreement among firms (or countries) in an industry to set the price of a product and establish the outputs of the individual firms (or countries) or to divide the market for the product geographically.
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price leadership
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An informal method that firms in an oligopoly may employ to set the price of their product: One firm (the leader) is the first to announce a change in price, and the other firms (the followers) soon announce identical or similar changes.
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one-time game
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A strategic interaction (game) between two or more parties (players) that all parties know will take place only once.
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simultaneous game
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A strategic interaction (game) between two or more parties (players) in which every player moves (makes a decision) at the same time.
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positive-sum game
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In game theory, a game in which the gains (+) and losses (−) add up to more than zero; one party's gains exceed the other party's losses. A strategic interaction (game) between two or more parties (players) in which the winners' gains exceed the losers' losses so that the gains and losses sum to something positive.
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zero-sum game
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In game theory, a game in which the gains (+) and losses (−) add up to zero; one party's gain equals the other party's loss. A strategic interaction (game) between two or more parties (players) in which the winners' gains exactly offset the losers' losses so that the gains and losses sum to zero.
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negative-sum game
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In game theory, a game in which the gains (+) and losses (−) add up to some amount less than zero; one party's losses exceed the other party's gains. A strategic interaction (game) between two or more parties (players) in which the winners' gains are less than the losers' losses so that the gains and losses sum to a negative number.
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dominant strategy
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In a strategic interaction (game) between two or more players, a course of action (strategy) that a player will wish to undertake no matter what the other players choose to do.
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Nash equilibrium
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The situation that occurs in some simultaneous games wherein every player is playing his or her dominant strategy at the same time and thus no player has any reason to change behavior.
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credible threat
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In a sequential game with two players, a statement made by Player 1 that truthfully (credibly) threatens a penalizing action against Player 2 if Player 2 does something that Player 1 does not want Player 2 to do. Opposite of empty threat.
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empty threat
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In a sequential game with two players, a noncredible (bluffing) statement made by Player 1 that threatens a penalizing action against Player 2 if Player 2 does something that Player 1 does not want Player 2 to do. Opposite of credible threat.
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repeated game
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A strategic interaction (game) between two or more parties (players) that all parties know will take place repeatedly.
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sequential game
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A strategic interaction (game) between two or more parties (players) in which each party moves (makes a decision) in a predetermined order (sequence).
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first-mover advantage
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In game theory, the benefit obtained by the party that moves first in a sequential game. A situation that occurs in a sequential game if the player who gets to move first has an advantage in terms of final outcomes over the player(s) who move subsequently.