The residential division of Prism’s high-speed Internet service uses one advertising agency, while its commercial division uses another. Two analysts, Andy and Brad, are asked to test and evaluate the effectiveness of the two agencies. Andy proposes an A/B test that compares the click-through rates per ad for the two agencies. Brad proposes a difference-in-dif-ference test in which the budgets for both agencies are increased by 50%, and the percent change in click-through rates is compared. What might be the sources of selection bias for the two proposals? Which is likely to be smaller?
The residential division of Prism’s high-speed Internet service uses one advertising agency, while its commercial division uses another. Two analysts, Andy and Brad, are asked to test and evaluate the effectiveness of the two agencies. Andy proposes an A/B test that compares the click-through rates per ad for the two agencies. Brad proposes a difference-in-dif-ference test in which the budgets for both agencies are increased by 50%, and the percent change in click-through rates is compared. What might be the sources of selection bias for the two proposals? Which is likely to be smaller?
Managerial Economics: A Problem Solving Approach
5th Edition
ISBN:9781337106665
Author:Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike Shor
Publisher:Luke M. Froeb, Brian T. McCann, Michael R. Ward, Mike Shor
Chapter17: Making Decisions With Uncertainty
Section: Chapter Questions
Problem 6MC
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The residential division of Prism’s high-speed Internet service uses one advertising agency, while its commercial division uses another. Two analysts, Andy and Brad, are asked to test and evaluate the effectiveness of the two agencies. Andy proposes an A/B test that compares the click-through rates per ad for the two agencies. Brad proposes a difference-in-dif-ference test in which the budgets for both agencies are increased by 50%, and the percent change in click-through rates is compared.
What might be the sources of selection bias for the two proposals?
Which is likely to be smaller?
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