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18 July, 21:09

Suppose that Marie is buying bananas. She decides that she would like to purchase three bananas at the price of $0.25 per banana, but not a fourth banana. Which of the five foundations of economics best describes Marie's thinking?

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  1. 18 July, 22:28
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    Marginal Thinking

    Explanation:

    The economic principle of marginal thinking means that rational people (people who act in a way that maximizes their personal well-being) think and take decisions at the margin.

    From the concept of marginal thinking, we derive concepts such as marginal utility, which is the extra benefit that a person obtains from the consumption of one extra unit of a good, and marginal cost, which is the extra cost a person must pay from the consumption of one more unit of a good.

    If the marginal cost is higher than the marginal benefit, a rational person decides not to consume the good.

    Marie is affected by marginal utility and marginal cost because while she considers that three bananas for $0.25 is a deal that benefits her, a fourth banana would represent a marginal utility that is less than the marginal cost, thus, she decides not to buy the fourth banana.
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