Chapter 2: Capital Budgeting Principles and Techniques QUESTIONS
1. a. What is the relationship between accounting income and economic profit?
Answer: Accounting income is calculated by taking revenues and subtracting all cash and noncash expenses (such as depreciation). Accounting income also often recognizes losses for tax purposes as well, even though the economic loss may have taken place at another time. Economic profit is the sum of the present values of all the cash flows net of expenses generated by the firm’s actions. Economic profit measures true increments to value, but is hard to measure. Accounting profit is correlated with economic profit, but not perfectly so. Accounting profit can be measured much more easily.
b. What is the relationship between accounting rate of return and economic rate of return?
Answer: The accounting rate of return is the ratio of aftertax profit to average book investment. Economic rate of return is the ratio of aftertax economic profit to the market value of the investment. Economic profit equals cash accruals to the asset combined with changes in its market value.
2. In 1991, AT&T laid a transatlantic fiber optic cable costing $400 million that can handle 80,000 calls simultaneously. What is the payback on this investment if AT&T uses just half its capacity while netting one cent per minute on calls?
Answer: $210 Million per year assuming the half capacity is for 24 hours a day, 365 days per year. The annual payback is then 53%.
3. The satisfied owner of a new $15,000 car can be expected to buy another ten cars from the same company over the next 30 years (an average of one every three years) at an average price of $15,000 (ignore the effects of inflation). If the net profit margin on these cars is 20 percent, how much should an auto manufacturer be willing to spend to keep its customers satisfied? Assume a 9 percent discount rate.
Answer: At a 20 percent profit margin, the auto company will earn an annuity of about $3,000 every three years for the next 30 years. Discounted at 9 percent, this annuity is worth $9,402, assuming that the first new car is purchased three years from today. Hence, an investment to keep customers satisfied will have a positive NPV as long as the amount spent is less than $9,402. Thus, a car company should be willing to spend up to $9,402 in present value terms to keep its customers satisfied. A trick is available to calculate the present value of this annuity. Recognize that an annuity received every three years for 30 years and discounted at 9 percent is equivalent to a 10 year annuity discounted at 29.5029 percent since each cash flow term is discounted at (1.09)3 = 1.295029.
4. Demonstrate that the following project has internal rates of return of 0 percent, 100 percent, and 200 percent.
Year

1

2

3

4

Cash flow

–$1,200

+7,200

–13,200

+7,200

Answer: To demonstrate that an IRR calculation is valid, compute the net present value at the IRR. A valid IRR yields NPV = 0.
Year

Cash Flow

PV@0%

PV@100%

PV@200%

1

1,200

1,200

600

400.00

2

+7,200

+7,200

+1,800

+800.00

3

13,200

13,200

1,650

488.89

4

+7,200

+7,200

+450

+88.89

Total

0

0

0

0

5. During 1990, Dow Chemical generated the following returns on investment in its different business units:
Business Unit

Return on Investment (%)

Plastics

16.6

Chemicals/Performance Products

16.7

Consumer Specialties

12.7

Hydrocarbons/Energy

5.2

Other

1.6

Dow Chemical overall

11.8

Given these returns, which of the business units should Dow invest additional capital in? What additional information would you need in order to make that decision?
Answer: These figures tell you what Dow earned in 1990. In order to decide on future investments, you need the following information:
1. Whether these returns are representative of those expected to be earned in the future in these different divisions. What matters for investment decisionmaking are projected future returns, not past returns. To the extent that these returns vary widely from year to year—which they do in the chemical business—historical return data for one year are meaningless. One reason these data may be misleading is that they are based on historical cost figures for investment. You really want to calculate returns on the replacement cost of assets. Inflation will cause asset values to be understated, which will lead the return on investment to be overstated.
2. The cost of capital for these divisions. Each division is likely to have its own risk and, hence, its own cost of capital. A high return could just indicate a high degree of risk and, therefore, a high required return. What matters is the projected return relative to the cost of capital. A high projected return that is less than the risk adjusted cost of capital will yield a negative NPV investment. Conversely, a low projected return that exceeds the cost of capital will yield a positive NPV investment.
3. The marginal return on investment in each division. Even if the figures for, say, the plastics and chemical/performance products divisions exceed their cost of capital and are representative of those expected to be earned in the future, that does not automatically justify additional investment in those divisions. These figures tell us the average ROI; for investment purposes you need the marginal ROI. That is, what matters for investment purposes is not the return on past investments but the return on future investments. As we have seen, many companies (e.g., Monsanto, Philip Morris) have divisions that yield high returns on past investments but very low returns on incremental investments.
4. The extent to which these divisions sell to one another. Dow Chemical is a vertically integrated company. Its hydrocarbons/energy unit sells to its downstream plastics unit, which in turn sells to its consumer specialties unit. Thus, the profitability of these units depends critically on the prices at which these internal transactions take place. For example, the hydrocarbons/energy unit may be showing a low ROI simply because it sells petroleum to the plastics unit at a below market price. That is, the hydrocarbons unit may be very profitable but its profits are showing up in the plastics unit in the form of a low price on raw materials. This is a form of cross subsidization. Disentangling the true profitability of the different units of a vertically integrated company like Dow turns out to be a very difficult task, but it is a necessary one for capital budgeting purposes. What matters is how profitable investments are from the standpoint of the overall company, not from the standpoint of the units undertaking those investments.
5. The returns associated with specific assets and activities within each division. What matters from an investment standpoint is not just how well each division can be expected to do in the future but how well specific projects within each division can be expected to do. For example, certain products within the profitable plastics division may be earning a 40% return while others are only earning a 2% return. Similarly, certain R&D investments may be expected to yield a high return relative to their riskiness, whereas others have little chance of a significant payoff. At the same time, the low return hydrocarbons/energy division may have some very high return projects, which are masked by a lot of value destroying activities elsewhere. Without detailed data on the returns associated with each division’s various activities, customers, and products, one can’t say where investment dollars would be best spent.
