| As the price of the substitute (coke) rises (falls), the demand for the product (pepsi) rises (falls) |
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 | Have you heard the news? | |
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| What is it about? | |
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| Coca-cola seems like they will increase the price of coca-cola drinks. | |
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| Is that so? Then, I would just buy Pepsi, then. | |
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| I guess, I'll change my preference to pepsi, too. | |
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