Chapter 1-4 Flashcards
Is clean air a scarce good in economic terms? Explain why.
Air itself is not a scarce good due to it being an unlimited resource, but clean air is because not all places have clean air available. For example, in highly populated areas, clean air is a scarce good due to all the air pollution produced by companies there. Because we eventually have to pay to get the clean air, it becomes a scarce good. (However, in Los Angeles, clean air is a scarce resource. We have to give up production of certain goods and services, resources used to make automobiles run with less pollution, and resources to make gasoline burn in a cleaner fashion. Because we must give up something in order to have clean air, clean air is what we call a scarce good.)
If a good or service is scarce..
we must give something up if we want more of the good. (A shortage only means that at the current price the quantity demanded is greater than the quantity supplied. The core of scarcity is not a shortage, but that we have to give up something else (time, alternative goods and services, etc.) if we want to enjoy any of this good or service.)
Clear skies and clear rivers are scarce goods. True or false?
Maybe, but only if they are in those areas of the world where we may have to give something else up in order to enjoy clear skies or clear rivers. (If we have to stop driving as much or change some production methods in order to experience clear skies and clear rivers, then clear skies and rivers are scarce goods.)
What is the opportunity cost of washing dishes every night for your family? Not just ½ hour; but what would you do with that time?
It depends. Some nights, maybe I could use that hour for studying for a test to get a better grade. Other nights, I could spend that hour with friends. It all just depends on the night and what I might want to do or have planned.
What is the opportunity cost of your also doing your neighbor’s dishes? a second neighbor’s dishes? a third? a fourth? Does your opportunity cost increase or decrease as you do more dishes? Why?
Each time you are doing more and more dishes, the opportunity cost increases also because I will lose more and more time that I could spent doing something else. Of course, there is a limitation of how many dishes I will be able to do. The more dishes I do, the less time I have for something else. (There is no one right answer to this question because the one best alternative for one person, the opportunity cost, may be very different than that for the next person. For person A the opportunity cost may be watching TV, while for Person B the opportunity cost may be spending a half-hour in an office working. This distinction is important.
It is safe to assume that the opportunity cost increases as you choose to wash the neighbors’ dishes. We have limited time to do the things we want to do. If we spend more and more of our time doing our own or someone else’s dishes, the value of other forgone opportunities will become increasingly high. The first half-hour may be giving up a chance to catch up with some work; the second may be giving up visiting with some old friends (an important opportunity); and the third might be missing the finish of the Bulls game (and that is important).)
Suppose that you are considering purchasing a ticket to go to a concert with some friends. What is your opportunity cost?
The opportunity cost is the money you spent on purchasing the ticket that you can spend on something else. You can spend it on something else like at the movie’s, buy groceries, etc. (The opportunity cost is what you would have purchased with the money you will spend on the concert and what you would have spent your time doing if you did not go to the concert. We cannot always assign dollar values to opportunity costs, but occasionally we can. If the cost of the concert ticket is $50 and I would have spent those three hours working for $10 per hour, the opportunity cost of going to the concert is what I could have purchased for $80 (the $50 plus 3 hours times $10). That is what I am giving up.
Note that in this case and in all others, opportunity cost does not include all possible alternatives. The opportunity cost of any choice is what you actually give up – the next best choice. If tonight you would like to go to a movie, visit with some friends, go to a concert, watch a television concert, catch up on sleep, or even study for next week, those are not all opportunity costs if you decide to go to a party instead. The opportunity cost of the party is the one single thing that you would actually have done instead.)
Suppose that I already have purchased a ticket for $50 to a sold-out concert. I could turn it back into the box office and get a refund, or I could sell it for $120 on eBay or Craigslist to someone who does not have a ticket. What is my opportunity cost of attending the concert?
The opportunity cost is $120 you could’ve gotten on eBay or craigslist, get a refund for that $50, and be able to spend the time doing something else. (Once again, the cost is what I give up by going to the concert. So, it is the cost of the ticket plus what I would have done with my time. In this case, however, the ticket cost has changed. Now, I do not give up the original $50. Assuming that the best price I can get for the ticket is $120, that is the real cost of the ticket for me now.
This is a much more difficult concept. You didn’t pay $120, but in a very real sense that is what you are giving up to go to the concert now. That, in that very real sense, is the real cost of the ticket. The $120 is the opportunity cost (along with what you would have done with your time))
Suppose that I already have purchased a ticket for $50 to a sold-out concert. I could turn it back into the box office and get a refund, or I could sell it for $120 on eBay or Craigslist to someone who does not have a ticket.
Suppose that you have purchased the ticket for $50. There is no scalping market. (People can buy tickets at the box office and it is illegal to buy or sell tickets from or to anyone else.) Also, suppose that the box office will not refund the ticket price once the ticket has been purchased. What is your opportunity cost of attending the concert in this case?
Zero, plus what I would have done with my time. (The correct answer is that even though I paid $50 for the ticket, it has no value now beyond getting me into the concert. Thus, the cost of going to the concert at this point is zero, plus what I would have done with my time. I cannot get my money back; I cannot sell it to someone else. (Let’s just assume that I am not allowed to give it to someone. If I could, there might be some benefit in doing so.) The idea is that the amount you originally paid is now irrelevant. What is relevant is what you are giving up at this time by going to the concert. The original payment is irrelevant. Whether you go to the concert or not will not affect that fact that you already paid the $50. The amount that you have already spent is a sunk cost. That amount is not affected by the choice you make now. It is sunk in that it is no longer available; it is gone; it is irrelevant to the current decision.)
I started a business last year. My revenues were $100,000. My rent and materials costs were $60,000. My best alternative was and is to go to work for a company in a job that would pay me $30,000. The “true” profits from my business were _____.
$10,000 (My revenues are $100,000. My costs of generating those revenues are the payments for rent and materials ($60,000) and the $30,000 that I could earn in my best alternative job. Thus my “true” profit is the $100,000 minus $90,000.)
Your college purchased a building east of campus for $500,000. Given changes in the city’s real estate market, the current market value of the building is now $2 million. The total value of the use of the building for the college is estimated to be $1.5 million. What should your college do? Explain why.
Not use the building. Using the building would mean losing $ .5 million in doing so. (If the college uses the building it will gain benefits of $1.5 million at a cost of $2 million. Not a good decision.)
A business has spent $50 million dollars on development of a new laptop. It must spend an additional $20 million to bring the finished computer to market. What must the value of the investment be for it to make sense for the business?
The value, if any, of the results of the $50 million spent so far, plus the $20 million. (The remaining required expenditure of $20 million is the easiest part to see. But if I could use the results of the development to date in an alternative project, or sell those results to another company, then the value in the alternative project or the amount I could get from selling those results to someone else, should also be included. If I cannot sell the results of that development or use them in an alternative project, then they should not be included as part of the consideration of whether or not to continue.)
Is tuition a part of the cost of deciding to go to college?
Yes (It is part of the cost because we have to give that amount of money to the college if we go. And we don’t have to give that amount up, if we decide not to go.)
Is room and board part of the cost of the decision to go to college?
Part of room and board may be part of the cost. (If room and board is more expensive than what your family spends on you at home, then that increase is a part of the cost. If your family continues to spend the same amount on housing and eating once you are gone (unlikely in the case of food), then the entire cost of room and board is part of the cost of going to college.)
Is the income you could earn after going to college part of the cost of going to college?
No (That is one of the benefits. Not a cost.)
Is the money, you could have earned instead of going to college, part of the cost of going to college?
Yes (Yes, it is because if that is what you would be doing instead of college, you are giving it up.)
A classic movie about the end of the world showed a floating island on what was the Pacific Ocean. In the middle of the movie filming, the set sank in a hurricane. The producers who had already spent $70 million on the set were faced with a new cost of $50 million to rebuild the set. Expected additional costs continued to be $100 million. The expected revenues were $160 million. Should they have rebuilt the set and finished the movie?
Yes. The set sank. What is it about sunk costs that you do not understand? (Once the set sank, the costs of completing the movie were $50 plus $100 million. The expected revenues were $160 million. So the decision to complete the movie lowered the losses from $ 70 million if they had stopped to $60 million if they completed the filming.)
I am thinking about going out to visit with some friends tonight. Given what I have learned in economics, I am comparing my costs with my expected benefits. My alternatives in order of preference are to stay in my room and watch TV; stay in my room and study economics; have my friends over to my room; or go to bed early tonight. What are the costs relevant to my decision?
The benefits gained from staying in my room and watching TV ( I am giving up the best alternative, not all of the alternatives. And staying in my room and watching TV is the most valuable alternative.)
Some friends and I are heading to a concert. We all have purchased $50 tickets. I just realized that I lost my ticket on the subway ride to the concert. I am confronted now with a decision of whether or not to buy a new ticket and go to the concert . Which of the following best describes that decision?
Is the concert worth paying $50 to attend? (The lost ticket is a sunk cost. I cannot get it back. Thus, the cost of going is buying a $50 ticket (plus the value of the time I will spend))
Why is it so difficult to ignore costs we have actually already paid?
Because they are explicit and we actually handed over a check. (Because we actually handed money to someone or wrote a check to someone.)
Why is it so difficult to consider costs that we have not physically paid as part of the cost of the decision?
Because we have not directly paid someone. (These costs are implied. We gave a sum up instead of accepting payment. So, it is a real cost. We would have had that amount.)
Good economic decision-making means..
Thinking about marginal benefits and marginal costs of the good and services (Rational choices require us to compare how our benefits and our costs will change as a result of a decision. So, we should think ‘on the margin’. What additional benefits will we generate? What additional costs will we have to pay?)
“When [Warren] Buffett graduated from Columbia, he asked Benjamin Graham for a job (for no salary) at the Graham-Newman Co. According to Buffett, ‘Ben made his customary calculation of value to price and said no’.” Warren Buffett Speaks. Janet Lowe. Wiley, p. 31. Can you explain the irony in this story? Use rational consideration of costs and benefits. What was Benjamin Graham really saying? Why might you be turned down for a nonpaying internship?
Even though it’s rare that someone doesn’t get hired for a job with no pay for his work, the company probably thought that it was not worth the time to train him for that job. The time to train him for the job is the marginal cost which would have been greater than the marginal benefit, what the company would’ve gotten from training him. (For those who do not know of him, Warren Buffett is the billionaire investor and entrepreneur, CEO of Berkshire Hathaway. Perhaps the second richest person in the world, he is reported to be very talented. It seems strange that he would not be hired for a job when he was not even asking for a salary. It is possible that the company did not see Buffett’s future potential. It is also possible and highly likely that Buffett would have been of little use to the company. It may have been more trouble than it was worth for the company to spend time training Buffett. The marginal cost of the time it would have taken to train Buffett exceeded the marginal benefit that the training would have created. Graham made a rational economic decision.)
Which of the following does not represent an opportunity cost of attending college?
Food (Food purchased at college will not be part of the cost. One must purchase food whether one goes to college or not. (The increase in costs of food is part of the opportunity cost if one is spending more than one would at home.))
A small clothing firm currently produces 50,000 shirts and blouses per month. The costs of its factory, raw materials, and labor is $500,000 per month. If the company is to increase production by 5,000 and that requires an additional labor and raw material expense of $100,000, what is the best estimate of costs of the increased production?
$100,000 (The best estimate of costs is what one has to give up to increase production. In this case it is $100,000.)