Ann lives in Princeton, New Jersey, and commutes by train each day to her job in New

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Ann lives in Princeton, New Jersey, and commutes by train each day to her job in New York City (20 round trips per month). When the price of a round trip goes up from $10 to $20, she responds by consuming exactly the same number of trips as before, while spending $200 per month less on restaurant meals.
a. Does the fact that her quantity of train travel is completely unresponsive to the price increase imply that Ann is not a rational consumer?
b. Explain why an increase in train travel might affect the amount she spends on restaurant meals.
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Principles of Economics

ISBN: 978-0073511405

5th edition

Authors: Robert Frank, Ben Bernanke

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