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utility
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Consumers are motivated to maximize their utility, the total satisfaction they service from the goods and services they consume
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total utility
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Which is the full satisfaction resulting from the consumption of that product by a summers
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marginal unit
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Is the additional satisfaction resulting from consuming one more unit of that product
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diminishing marginal unity
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the utility that any consumer derives from successive units of a particular product consumed over some period of time diminishes as total consumption of the product increases (holding constant the consumption of all other products)
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single proprietorship
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one owner responsible for all aspects of business (painters, plumbers)
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ordinary partnership
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two or more joint owners who split responsibility (start up business)
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limited partnership
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general partners (run business and in charge of firm's debt) or limited partners (not running business and liable to amount they invest)
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corporation
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having identity of its own, owners are not personally responsible but directors might be, private corporation not traded in stock exchange
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state-owned enterprise
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owned by government but under direction of more/less independent, state-appointed board
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non-profit organization
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providing goods to customers but profits aren't claimed by individuals (YMCA)
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financial capital
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money a firm raises for carrying on it's business (two types are equity and debt)
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real capital
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physical assets of a firm (machinery)
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dividends
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profits paid out to shareholders
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redemption date
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time in which principal needs to be paid
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term
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amount of time between issue of debt and redemption debt
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principal
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repay amount borrowed
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interest
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make some form of extra payment to lender
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equity
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funds provided by owners of firm
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debt
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funds borrowed from credits (individuals or institutions) outside firm
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significance of productivity growth
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"dismal science", predictions of Malthus, why he was wrong (Populations did not expand as quickly as predicted and Technological advancements have increased output
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AP (average product)
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TP/L
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MP (marginal product)
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ΔTP/ΔL
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TC (total cost)
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TFC + TVC
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ATC (average total cost)
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TC/Q or AFC + AVC
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AFC (average fixed cost)
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TFC/Q
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AVC (average variable cost)
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TVC/Q
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MC (marginal cost)
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ΔTC/ΔQ
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economies of scale
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when long run average costs fall as output rises
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productivity
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minimize the average variable cost of production
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profit formula
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total revenue - total cost or (p-ATC) x Q
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3 aspects of technological change
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new techniques, improved inputs, new products
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firms in the very long run
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substitute away or innovate away input (product large profit to account for any risk in invention and innovation)
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signifiance of productivity growth
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"dismal science", predictions of Malthus, wrong for two reasons (populations did not expand as quickly as predicted and Technological advancements have increased output)
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marginal rate of substitution
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the rate at which one factor is substituted for another with output being held constant (measured by slope of isoquant at a certain point)
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isoquant
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firm's alternative methods for producing a given level of output (efficient factor combinations for producing a given level of output)
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assumptions of a perfect competition
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all firms sell homogenous product, consumers know characteristics of products being sold and prices charged by firms, each firm is small relative to the size of the industry, freedom of entry and exit
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TR (total revenue)
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price x output (q)
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AR (average revenue)
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p or p x q/q
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MR (marginal revenue)
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ΔTR/ΔQ
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For a competitive price-taking firm, the market price is
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the firm's marginal (and average) revenue
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a firm should not produce at all if
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TR < TVC or market price < AVC
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shut-down price
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the lowest price a firm can cover its AVC and therefore can produce or not produce (where AVC is at min)
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supply curve for competitive firm
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part of MC curve that's above AC curve
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short-run equilibrium
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when each firm is producing and selling a quantity where marginal cost equals the market price
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When the industry is in short-run equilibrium, a competitive firm may be
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making losses, breaking even, or making profits
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The long-run equilibrium of a competitive industry occurs when
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firms are earning zero profits
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break-even price
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price at which a firm is just able to cover all of its costs, including the opportunity cost of capital
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For a competitive firm to be maximizing its long-run profits
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it must be producing at the minimum point on its LRAC curve
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TVC (total variable cost)
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AVC x Q
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firm should not produce if
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market price is less than AVC
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If MR > MC
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increase output
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shutdown when
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marginal revenue < AVC or p<AVC
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industry supply curve in perfect competition is
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horizontal sum of marginal cost curves
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LRAC
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lowest cost of producing any ouput when all factors are variable
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SRAC
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lowest cost of producing any output when 1 or more factors are fixed
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diseconomies of scale
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increases in cost per unit when output decrease in returns
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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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least cost method of producing any ouput is
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less labor and more technology
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perfectly competitive market means
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firms have no power in the market
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demand curve for industry is
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negatively sloped
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firms in perfectly competitive industry have
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horizontal demand curve
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for competitive price-taking firms, market price is
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firm's marginal and average revenue
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firms can maximize profits by
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p = MC or MR = MC and p>AVC
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long run equilibrium occurs when firms earn
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0 profit
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conditions for long run equilibrium
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maximizing profits, not suffering losses, not earning profits, not able to increase profits by changing size of production facilities (be at min point of LRAC curve)
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monopolist demand curve
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negative slope
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marginal revenue for monopolist
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less than price so MR curve is below demand curve
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monopolist produces price __ marginal cost
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greater than
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perfectly competitive firm produces price __ marginal cost
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equals
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profit per unit
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revenue - cost for each unit sold
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total profit
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profit per unit x total number of units sold
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under perfect price discrimination, consumer surplus is
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zero since monopolist captured all of surplus
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perfect price discrimination
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firm charges maximum amount that buyers are willing to pay for each unit
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collusion
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firms agree to cooperate to restrict output and raise prices
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overt, covert, tacit collusion
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open, secret, no solid agreement
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oligopolist compete with each other through
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reducing prices to attract customers, non-price competition like advertising, and new products/improvements
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created barriers from oligopolies
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brand proliferation, advertising, predatory pricing, purchasing rival firms
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3 characteristics of imperfectly competitive firms
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firms differentiate products, set prices, engage in non-price competition
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excess capacity theorem
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firms in monopolistic competition produce output where ATC isn't at minimum
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downward slope demand curve means
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some market power and that p>MR