Exam 1: The Scope and Method of Economics

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In the figure below, is the slope positive or negative? Calculate the slope. In the figure below, is the slope positive or negative? Calculate the slope.

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The slope is positive because the line is upward sloping. The slope is equal to the change in Y (which is equal to 4) divided by the change in X (which is equal to 2). Therefore, the slope is equal to (4/2) which equals 2.

Define a variable and give two examples that would apply to economics.

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A variable is a measure that can change from time to time or from observation to observation. Income is a variable-it has different values for different people and different values for the same person at different times. The rental price of a movie on a DVD is a variable; it has different values at different stores and at different times.

It is widely known among baseball enthusiasts that Babe Ruth actually performed quite well as a pitcher before leaving the Boston Red Sox for the New York Yankees. He was also of course a famously successful hitter. Why do you believe the Yankees chose not to use him as a pitcher? Explain using economic reasoning. Hint: pitchers typically only play every third or fourth game whereas other players in other positions play in nearly every game. Baseball has a season of 162 games.

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The economic reasoning probably had something to do with opportunity cost. Even though the Yankees may have won most of the games when Babe Ruth was pitching he would no doubt be able to contribute to more wins as a hitter since he would be playing in more games as an outfielder or any other non-pitching position. The opportunity cost of having him as a pitcher was simply too high in terms of the number of games that would be lost when he wasn't playing.

Explain what is meant by allocative efficiency.

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Explain the difference between positive economics and normative economics.

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When is it more expensive for a country to go to war - during a recession or during an economic boom? Explain.

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Your boss explains to you that the total fixed costs of the company are $1 million. He also informs you that each unit of production will cost twenty five cents more with each 100-unit increase. He has asked you to draw the fixed costs of the company with costs on the vertical axis and quantity of goods sold on the horizontal axis. Without drawing a graph tell your boss what the graph will look like using words. What information did your boss give you that you didn't need in order to draw the graph?

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Examine the following function: Y = 3x + 2. What is the slope of this function and why?

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Suppose an economics forecaster discovers that on days when the sunspot count is high stock market on the following day is bullish, that is stock market prices edge upwards. In addition, he also observes that on days with a low sunspot count the following day the stock market tends to be bearish, that is stock market prices tend to fall. The forecaster then concludes that there is a positive relationship between the sunspot count and stock market prices and proceeds to base his investment decisions on this premise. What kind of an error has this forecaster made?

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What does the phrase "post hoc, ergo propter hoc" mean?

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Graph the following equation with qd on the horizontal axis and calculate the slope: P = 10 - 2qd.

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Should economics be considered a science? Why or why not?

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Explain what is meant by the term ceteris paribus. Why is this concept often used in economic models?

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What is meant by the phrase, "There is no such thing as a free lunch"?

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Suppose that as wages increase the quantity of labor supplied increases as well. However, assume that at some point as indicated in the table below increases in wages actually lead to a reduction in the quantity of labor supplied. Graph this relationship with the quantity of labor on the horizontal axis and the wage rate on the vertical axis.

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Explain how to calculate the slope of a non-linear function. What does the slope measure?

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Evaluate the following statement: "Water is plentiful, therefore it can't be a scarce resource like oil which is not as plentiful."

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Why would an economist argue that tuition is not the largest cost of attending a state university?

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Assume that you are the new CEO of a major corporation that has five major product lines each run as separate corporations. You discover that if you invested the company's money outside of the firm that it could earn a 15% rate of return on the investment. You tell all the presidents of each of these subsidiary companies that in order for them to remain with the company that their return on capital must equal to or exceed 15% rate of return. Use two economic principles discussed in chapter 1 to explain why the CEO's advice is sound.

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Graph the following equation with qs on the horizontal axis and calculate the slope: P = 6 + 3qs.

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