Macroeconomics (Fourth Edition)
Macroeconomics (Fourth Edition)
4th Edition
ISBN: 9780393603767
Author: Charles I. Jones
Publisher: W. W. Norton & Company
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Chapter 4, Problem 1RQ
To determine

Describe the macroeconomic model.

Expert Solution & Answer
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Explanation of Solution

Macroeconomic models are also toy versions of the real world that contain the key moving parts to give us an idea about how the real world really works.

In order to generate real insights, a model of ice cream production only needs a few key features in common with the real economy. For example, the more the workers, more ice cream can be produced, and if there are more machines, then more ice cream can be produced. If one gets a new idea for developing machines, then even more ice cream can be made with less number of workers.

In this case, the model can easily capture positive and diminishing returns to a factor, constant returns to scale, and increasing returns to ideas, but it is extremely simple. It helps one to forget unnecessary details about real life such as human emotions, the need for health care and nutrition, the distribution of income, natural resources, and so forth. Economics has progressed as a science when it has left things out.

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In the context of investment risk, what does "diversification" mean? A) Spreading investments across various assets to reduce riskB) Investing in a single asset to maximize returnsC) Increasing investment in high-risk assetsD) Reducing the number of investments to focus on high-performing ones
At the 8:10 café, there are equal numbers of two types of customers with the following values. The café owner cannot distinguish between the two types of students because many students without early classes arrive early anyway (that is she cannot price discriminate).     Students with early classes Students without early classes Coffee 70 60 Banana 50 100     The MC of coffee is 10.  The MC of a banana is 40.  Is bundling more profitable than selling separately?  HINT:  if you sell the bundle, can you make more by offering coffee separately? If so, what price should be charged for the bundle? (Show calculations)
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