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151001The change in producer's surplus when the market price changes from p1 to p2 is half of the area to the left of the marginal cost curve between p1 and p2.。
151002The marginal cost curve passes through the minimum point of the average fixed cost curve.。
151003The average variable cost curve must always be U shapeD.。
151004If output is produced according to Q = 4LK， the price of K is $10， and the price of L is$10， then the cost minimizing combination of K and L capable of producing 16 units of output is
151005If it costs $10 to set up and later clean a bagel press and bagels cost $1 per week， per bagel， to store， how many times should the bagel press be run each week to produce 500 bagels a week to be sold continuously？
151006The cost function c（w1，w2，y） expresses the cost per unit of output of producing y units of output if equal amounts of both factors are useD.。
151007A profit maximizing dairy farm is currently producing 10，000 gallons of milk per day.The government is considering two alternative policies.One is to give the farm a lump sum subsidy of $500 per month.The other policy is to give the farm a subsidy of $.05
151008A profit maximizing firm continues to operate even though it is losing money.It sells its product at a price of $100.From these facts we deduce that：
151009Price equals marginal cost is a sufficient condition for profit maximization。
151010In a perfectly competitive industry， the demand curve for the total output of the industry may be downward sloping.。
151011A firm in a competitive industry takes account of the fact that the demand curve it confronts has a significant negative slope.。
151012A competitive firm produces output using three fixed factors and one variable factor.The firm's short run production function is q=163x-2x2 ， where x is the amount of variable factor used.The price of output is $3 per unit and the price of the variabl
151013When Farmer Hoglund applies N pounds of fertilizer per acre， the marginal product of fertilizer is 1-（N=200） bushels of corn.If the price of corn is $1 per bushel and the price of fertilizer is $0.40 per pound， then how many pounds of fertilizer per acre
151014The production function is given by F（L）=6L2/3 .Suppose that the cost per unit of labor is 12 and the price of output is 6， how many units of labor will the firm hire？
151015Just as in the theory of utility maximizing consumers， the theory of profit maximizing firms allows the possibility of "Giffen factors".These are factors for which a fall in price leads to a fall in demanD.。
151016A profit-maximizing competitive firm uses just one input， x.Its production function is q = 8x1/2.The price of output is 16 and the factor price is 8.The amount of the factor that the firm demands is：
151017A competitive firm produces output using three fixed factors and one variable factor.The firm'；s short run production function is ；， where x is the amount of variable factor used.The price of output is $3 per unit and the price of the variable factor
151018A fixed factor is a factor of production that is used in fixed proportion to the level of output.。
151019The weak axiom of profit maximizing behavior states that in a modern mixed economy， firms have only a weak incentive to maximize profits.。
151020The marginal product of a factor is just the derivative of the production function with respect to the amount of this factor， holding the amounts of other factor inputs constant.。
151021A firm has a production function f（x，y）=1：10（x0.20 + y0.20）5 whenever x > 0 and y > 0.
151022The production function Q = 50K0.75L0.75 exhibits
151023The production function f（x，y） = x + y has constant returns to scale。
151024In any production process， the marginal product of labor equals：
151025If a firm moves from one point on a production isoquant to another point on the same isoquant， which of the following will certainly NOT happen？
151026A production isoquant is a locus of combinations of inputs that are equally profitable.。
151027The production set of a firm is the set of all products the firm can produce.。
151028The demand function for rental apartments is q = 960-7p and the supply function is q = 160 + 3p.The government makes it illegal to charge a rent higher than 35.How much excess demand will there be？
151029The demand function for x is D（p） = 65-2p and the supply function is S（p） = 20 + p.The price that should be set to restrict quantity supplied to 30 units is closest to：
151030If a quantity tax is collected from competitive suppliers of a good， placing a tax on the good causes the price paid by consumers to increase more than if the tax had been collected directly from the buyers.。
151031The demand function for fresh strawberries is q = 200-5p and the supply function isq=60+2p.What is the equilibrium price？
151032The demand for pickles is given by p=131-2q and supply is given by p=5+7q.What is the equilibrium quantity？
151033An economic situation is Pareto optimal only if there is no way to make someone better off.。
151034The supply curve slopes up and to the right.If the demand curve shifts upward to a new curve which is everywhere higher than the old curve（but possibly of different slope） and if the supply curve does not shift， then the equilibrium price and quantity mus
151035If the supply curve is vertical， then the amount supplied is independent of price.。
151036If the marginal cost of brewing beer is 40 cents and the profit maximizing price is 80 cents，then the price elasticity of demand is
151037The constant elasticity of demand for cigarettes has been estimated to be 0.5.To reduce smoking by 75%， approximately how much tax needs to be added to a $1 pack？
151038Marginal revenue is equal to price if the demand curve is horizontal.。
151039The demand function is described by the equation q（p） = 190- p/5.The inverse demand function is described by：
151040A peck is 1/4 of a bushel.If the price elasticity of demand for bran is -0.2 when bran ismeasured in bushels， then when bran is measured in pecks， the price elasticity of demand for bran will b
151041If the demand function is q = 3m=p； where m is income and p is price， then the absolute value of the price elasticity of demand decreases as price increases.。
151042If a price changes， then changes in consumption at the intensive margin are changes that happen because consumers alter the amounts that they consume， but do not either stop consuming or start consuming the gooD.。
151043The inverse demand curve P（x） for a good x measures the price per unit at which the quantity x would be demandeD.。
151044At the initial prices， Teodoro is a net seller of apples and a net buyer of bananas.If the price of apples decreases and the price of bananas does not chang
151045Sam has quasilinear preferences and his demand function for x is D（p） = 15-p/3.The price of x is initially $15 per unit and increases to $24 per unit.Sam'；s change is consumer surplus is the closest to：
151046Sir Plus has a demand function for mead that is given by the equation D（p） = 100-P.If the price of mead is 75， how much is Sir Plus'；s net consumer surplus？
151047Ella'；s utility function is min{4x，y}.If the price of x is 15 and the price of y is 20， howmuch money would she need to be able to purchase a bundle that she likes as well as the bundle（x，y） =（5，8）？
151048With quasilinear preferences， the equivalent variation and the compensating variation in income due to a tax are the same.。
151049The equivalent variation in income from a tax is the amount of extra income that a consumer would need in order to be as well off after the tax is imposed as he was originally.。
151050Consumer'；s surplus is another name for excess demanD.。
151051Yoram insists on consuming 3 times as much y as he consumes of x（so he always has y = 3x）.He will consume these goods in no other ratio.The price of x is 2 times the price of y.Yoram has an endowment of 24 x'；s and 42 y'；s which he can trade at th
151052If Abishag owns 16 quinces and 15 kumquats， and if the price of kumquats is 4 times the price of quinces， how many kumquats can she afford if she buys as many kumquats as she can？
151053If Abishag owns 12 quinces and 10 kumquats， and if the price of kumquats is 3 times the price of quinces， how many kumquats can she afford if she buys as many kumquats as she can？
151054Mr.Cog has 18 hours per day to divide between labor and leisure.His utility function is U（C，R） = CR； where C is dollars per year spent on consumption and R is hours of leisure.If he has a nonlabor income of 40 dollars per day and a wage rate of 8 dollars
151055If leisure is a normal good， then an increase in non-labor income will reduce labor supply.。
151056Yoram insists on consuming 3 times as much y as he consumes of x（so he always has y = 3x）.He will consume these goods in no other ratio.The price of x is 2 times the price of y.Yoram has an endowment of 24 x0s and 42 y0s which he can trade at the going pr
151057Marsha Mellow is very flexible.She consumes x and y.She says `Give me x or give me y； I don'；t care.I can'；t tell the difference between them.'； She is currently endowed with 14 units of x and 6 units of y.The price of x is 4 times the price o
151058If a utility maximizer is a net seller of something and the price of that good rises while other prices stay constant， her situation might improve so much that she becomes a net buyer。
151059If a consumer is a buyer of some goods and a seller of others， then a change in prices will generate an extra income effect in the Slutsky equation due to the revaluation of the consumer'；s endowment.。
151060If a rational utility maximizer is a net demander of a good， and if an increase in its pricecauses him to buy more of it， then it must be an inferior gooD.。
151061Suppose that bananas are a normal good and Woody is currently consuming 100 bananas at a price of 10 cents each.
151062When the price of x rises， Marvin responds by changing his demand for x.The substitution effect is the part of this change that represents his change in deman
151063The following can be said about the income and substitution effects of a price increase on the demand for the good whose price ros
151064John purchases two goods， x and y.Good x is an inferior good for some range of income.There must be another range of income for which good x is a normal gooD.。
151065Suppose that bananas are a normal good and Woody is currently consuming 100 bananas at a price of 10 cents each.。
151066Walt considers x and y to be perfect substitutes.They originally cost 10 and 9 respectively.His income is 720.One day the price of x drops to 8.Which of the following is true？
151067In the case of homothetic preferences the entire change in demand from a price change is due to the substitution effect.。
151068The compensated demand function refers to the demand function of someone who is adequately paid for what he for she sells.。
151069A Giffen good must be an inferior gooD.。
151070A student spends all of her income on pizza and books.When pizzas cost $3 each and books cost $10 each， she consumed 30 pizzas and 3 books per month.The price of pizzas fell to $2.90 each while the price of books rose to $11 each.The price chang
151071At prices（4，12）； Harry chooses the bundle（9，4）.At the prices（8，4）； Harry chooses the bundle（2，9）.Is this behavior consistent with the weak axiom of revealed preference？
151072It follows from the weak axiom of revealed preference that if a consumer chooses x when he could afford y and chooses y when he could afford x； then his income must have changed between the two observations.。
151073Remember that the Laspeyres price index uses the old quantities for the weights.In 1971， good x cost 3 and good y cost 1.The current price of good x is 3 and the current price of good y is 5.In 1971 the consumption bundle was（x，y） =（3，5）.The current consu
151074Let A stand for the bundle（7，9）；B stand for the bundle（10，5）； and C stand for the bundle（6，6）.When prices are（2，4）； Betty chooses C.When prices are（12，3） she chooses A.Which of the following is true？
151075The Laspeyres price index differs from the Paasche price index because the Laspeyres index holds prices constant and varies quantities while the Paasche price index holds quantities constant and varies prices.。
151076If a consumer maximizes a utility function subject to a budget constraint and has strictly convex preferences， then his behavior will necessarily satisfy the weak axiom of revealed preference and the strong axiom of revealed preference.。
151077The strong axiom of revealed preference requires that if a consumer chooses x when he can afford y； and chooses y when he can afford z； then he will not choose z when he can afford x.。
151078Madonna buys only two goods.Her utility function is Cobb-Douglas.Her demand functions have which of the following properties？
151079Walt consumes strawberries and cream but only in the fixed ratio of three boxes of strawber ries to two cartons of cream.At any other ratio， the excess goods are totally useless to him.The cost of a box of strawberries is 10 and the cost of a carton of c
151080Quasilinear preferences are homothetic when the optimal amount of one of the goods is not affordable.。
151081Mike consumes two commodities， x and y； and his utility function is min{x +2y，y+2x}.He chooses to buy 8 units of good x and 16 units of good y.The price of good y is 0.50.What is his income？
151082An Engel curve is a demand curve with the vertical and horizontal axes reverseD.。
151083If two goods are substitutes， then an increase in the price of one of them will increase the demand for the other.。
151084If preferences are quasilinear， then for very high incomes the income offer curve is a straight line parallel to one of the axes.。
151085Wanda Littlemore'；s utility function is U（x， y） = x + 63y2.Her income is 184.If the priceof x is 1 and the price of y is 33， how many units of good x will Wanda demand？
151086Hans has 27 dollars， which he decides to spend on x and y.Commodity x costs $16 per unit and commodity y costs $10 per unit.He has the utility function U（x， y）=5x2 + 2y2 and he can purchase fractional units of x and y.
151087With quasi-linear preferences， the slope of indifference curves is constant along all rays through the origin.。
151088If preferences are transitive， more is always preferred to less.。
151089If there are two goods with positive prices and the price of one good is reduced， while income；and other prices remain constant， then the size of the budget set is reduceD.。
151090The only requirement for a market to be perfectly competitive is for the market to have many buyers and sellers.。
151091The conflict between the scarce economic wants of society and its limited resources gives rise to the economizing problem.。
151092The demand curve shows（）
151093Economics proceeds by making models of（）， which are simplified representations of reality.
151094What Microeconomics is about？（）
151095循证医学发展的背景包括
151096循证医学对未来医学的影响是
151097循证医学方法的手段是
151098循证医学的基石是
151099循证医学所收集的证据中，质量最佳者为
151100循证医学实践的核心是
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