Managerial economics 3rd by froeb ch04

11 Chapter Extent (How Much) Decisions Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Chapter – Summary of main points • Do not confuse average and marginal costs • Average cost (AC) is total cost (fixed and variable) divided by total units produced • Average cost is irrelevant to an extent decision • Marginal cost (MC) is the additional cost incurred by producing and selling one more unit Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Chapter – Summary (cont.) • Marginal revenue (MR) is the additional revenue gained from selling one more unit • Sell more if MR > MC; sell less if MR < MC If MR = MC, you are selling the right amount (maximizing profit) • The relevant costs and benefits of an extent decision are marginal costs and marginal revenue If the marginal revenue of an activity is larger than the marginal cost, then more of it • An incentive compensation scheme that increases marginal revenue or reduces marginal cost will increase effort Fixed fees have no effects on effort • A good incentive compensation scheme links pay to performance measures that reflect effort Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Introductory anecdote: US Financial Crisis • The financial crisis began in the subprime housing market, where government policies encouraged lenders to extend credit to lowincome borrowers (by lowering lending standards) • Concurrently mortgages were being packaged into securities and sold to investors • If the risk had been recognized investor demand would have been low, but rating agencies were too liberal with AAA ratings, increasing demand for loans • The result? A credit “bubble” • How did this lending crisis arise? Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Background: Average cost • Definition: Average cost is simply the total cost of production divided by the number of units produced AC = TC/Q • Average costs often decrease as quantity increases due to presence of fixed costs • AC = (VC + FC)/Q • FC does not change as Q increases • Average costs are not relevant to extent decisions Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Background: Average cost (cont.) Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Background: Marginal cost • Marginal cost is the cost to make and sell one additional unit of output MC = TCQ+1 – TCQ • Marginal cost is often lower than average cost (due to falling average costs) but not always • Marginal costs are what matter in extent decisions Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Extent (how much?) decisions • Definition: Marginal cost (MC) is the additional cost required to produce and sell one more unit • Definition: Marginal revenue (MR) is the additional revenue gained from producing and selling one more unit • If the benefits of selling another unit (MR) are bigger than the costs (MC), then sell another unit • So, produce more when MR>MC; less when MR MCTV so shift ad dollars from phone to TV • Advice: make changes one-at-a-time to gather valuable information about marginal effectiveness of each medium Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Another example • SAH=“Standard Absorbed Hours” a measure of textile factory output • Allows managers to compare factories making different items, e.g t-shirt = SAH while dress=3 SAH • Suppose Factory A has costs of $30 per SAH while Factory B has cost of $20 per SAH How can you profitably use this information? • The decision seems simple, but • Make sure you are not including fixed costs in the analysis • Marginal costs matter, not average costs! • If the $20 and $30 rates are good MC proxies, shift some production from Factory A to Factory B Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Effort is an extent decision • Discussion: Royalty rates vs fixed fee contracts • You receive two bids to harvest 100 trees on your land • $150/tree or $15,000 for the right to harvest all the trees • On your tract there are pines (worth $200) and fir (worth $100) • Which offer should you accept? • Discussion: Sales Commissions • Expected sales level: 100 units @ $10,000/unit=$1M • Option 1: 10% commission • Option 2: 5% commission + $50,000 salary • Discussion: give example of royalty rate or fixed fee contracts in your firm Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Tie pay to performance • A consulting firm COO received a flat salary of $75,000 • After learning about the benefits of incentive pay in class, the CEO changed COO compensation to $50K + (1/3)* (Profits-$150K) • Profits increased 74% to $1.2 M • Compensation increased $75K  $177K • Discussion: what are the disadvantages to incentive pay? Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part Alternate intro anecdote • American Express offers a Platinum Card to affluent customers • In 2001, there were approximately 2,000 Platinum cardholders in the Japanese market Numbers had been limited to ensure high quality customer service • With customer service technology advances, company considered expanding number of card holders • How many more should be added? • As more members are acquired, average spending per card member decreases because the financial threshold for membership is lowered • Costs of customer service rise for each additional member added, and growing beyond a certain point would require building and operating an additional call center • After analyzing the costs and benefits, American Express realized that it should expand its offering to only 15,000 more Platinum Card members • We call this an “extent” decision, because the company needed to decide “how many” platinum cards to provide In this chapter, we show you how to make profitable extent decisions Copyright ©2014 Cengage Learning All Rights Reserved May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part  ... cost (fixed and variable) divided by total units produced • Average cost is irrelevant to an extent decision • Marginal cost (MC) is the additional cost incurred by producing and selling one more... housing market, where government policies encouraged lenders to extend credit to lowincome borrowers (by lowering lending standards) • Concurrently mortgages were being packaged into securities and... Background: Average cost • Definition: Average cost is simply the total cost of production divided by the number of units produced AC = TC/Q • Average costs often decrease as quantity increases due