課程名稱︰個體經濟學一
課程性質︰經濟學
課程教師︰劉鶯釧
開課學院：社科院
開課系所︰經濟系
考試時間︰2006/11/2
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
John has an income of $200 and buys only two goods, X and Y.
Answer the following questions.
1.(1) Suppose 1X and 2Y are perfect complements. One day, X costs $5 each and Y
costs $10 each. Draw a graph showing John's consumer equilibrium.(15%)
(2) The next day, the price of X increases from $5 to $20. Show John's new
equilibrium and calculate the substitution effect and income effet.(30%)
2.(1) Suppose 1X and 1Y are perfect substitutes. The prices of X and Y are
both $5. Show John's consumption choice(s).(15%)
(2) Now the price of Y goes up to $10. Show John's new choice of consumption.
(15%)
(3) Suppose the prices of X and Y are $5 and $20 respectively. Derive John's
Engel curve of X. And what is the income elasticity of demand for X?(25%)
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