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Economic models are most often testedIf the utility for two goods “x” and “y” is measured as U = x + y, then it can be concluded thatA:using data from the real world. B:using computer simulations. C:using data from the distant past. D:using logic alone. 答案: using data from the real world.A:the indifference curves on the x,y graph will be upward sloping. B:”x” and “y” are both bads. C:”x” and “y” are perfect complements. D:”x” and “y” are perfect substitutes. 答案: “x” and “y” are perfect substitutes.
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