答案和详解如下： 1.Economics commentator Gail Brythe is discussing the different factors that influence the elasticity of supply. She states the following: Statement 1: Elasticity of supply is greater when a good or service can only be produced with unique or rare inputs. Statement 2: Typically, a good’s momentary supply elasticity is higher than its short-run supply elasticity, which in turn is higher than its long-run supply elasticity. Are Brythe’s statements correct?
A) Correct Correct B) Correct Incorrect C) Incorrect Incorrect D) Incorrect Correct The correct answer was C) Both statements are incorrect. Elasticity of supply (i.e., the responsiveness of the supply of a good to changes in its price) is low when a good can only be produced with rare or unique inputs, because the potential output of the good is constrained by the availability of those inputs. Supply elasticity is lowest in the momentary time frame because producers typically cannot change the output of a good immediately. Supply becomes more elastic as the time frame increases because long-run adjustments in capital investment and technology lead to greater changes in profit maximizing output levels. 2.Which of the following is least likely to affect the elasticity of supply for a good? A) The time frame for making the supply decision. B) The uniqueness of production inputs. C) The availability of substitutes for production input(s). D) The relative amount of income spent on the good. The correct answer was D) Elasticity of supply is influenced by the time frame within which the supply decision is made and the ability to make substitutions between productive resources. Unique inputs do not have good substitutes. The relative amount of income spent on a good is a determinant of the price elasticity of demand. | 
发表于 2008-4-4 16:49
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