The Teaching Economist


Issue 7

William A. McEachern, Editor

Table of Contents

A Teaching "Magna Carta"
Teaching in PH.D. Programs
Multiple-Choice Questions
Grapevine
Odds and Ends
The Evidence File

A Teaching "Magna Carta"

In case you missed it, a remarkable advertisement entitled "Petition to Reform Graduate Education" appeared in the December 1993 issue of the American Economic Review (pp. ii-iii). The petition, which was signed by 463 economics instructors at undergraduate institutions, was directed at economics graduate programs, stating that "many of your graduates are not receiving as part of their total graduate education the training that we believe is necessary to be good teachers of undergraduates." The petition goes on to list the preparation desired, including

"A background in the economic debates and literature of the past 20 years and how those debates have shaped what we as a profession believe; a solid training in the models which they will be beaching to undergraduates; a knowledge of economic institutions and the role institutions play in the economy; an ability to communicate the central ideas conveyed in introductory and intermediate micro and macro [courses]; knowledge of the alternative approaches in economics and an ability to compare and contrast different approaches; and a knowledge of econometrics, and limits of econometric testing."

The petitioners warn they will structure their "hiring practices to favor students who have trained in those areas and skills that are most useful in teaching undergraduates." The signers, some who have contributed teaching ideas to "The Grapevine," are from a cross section of undergraduate colleges including some of the best--Amherst, Bates, Davidson, Middlebury, Smith, Washington and Lee, Wesleyan, and Wellesley. Whether this "Magna Carta" has any effect on graduate instruction remains to be seen, but it's an interesting development and one to follow.

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Teaching in PH.D. Programs

Speaking of teacher preparation--Larry White, economics chairman at New York University, recently surveyed 114 Ph.D.-granting departments about how they assess teaching effectiveness. (See Lawrence J. White "Efforts by Departments of Economics to Assess Teaching Effectiveness: Results from an Informal Survey," memo. You can write him at NYU School of Business, 44 West 4th Street, Room 7-88, New York, NY 10012.) All 76 respondents use student-evaluation instruments, though many seemed wary of their value. In some departments, evaluations are voluntary (though encouraged), and in some departments they are not used in all courses.

About two-thirds of the responding departments employ at least one assessment method beyond student evaluations, such as classroom visits by faculty, videotaping, or statements of teaching philosophy. Professor White sorted departments into three groups based on the quality of the Ph.D. program: the top 20, 21 through 50, and below 50; then he looked for any link between program quality and the use of teaching assessment tools. Only 27% of departments in the top 20 used something beyond student ratings, compared to 59% of the 21 through 50 group and 76% of the bottom group. For example, none of the top 20 departments used a classroom visit, but one-third of other departments did.

White concluded that most Ph.D.-granting departments are devoting more time and resources to assessing teacher effectiveness, despite their uncertainties about the validity of their evaluation systems. Also, the higher the quality of the Ph.D. program, the less likely the department sought feedback beyond that provided by student evaluations. This latter issue may ties back into the problems stated by the petitioners troubled about teachers preparation.

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Multiple-Choice Questions

Inevitably, those who teach large classes often rely on multiple-choice questions for at least part of their exams. Here are ten suggested guidelines for writing your own questions or for selecting questions from a test bank. Much of this will be familiar, but as Will Rogers said, "None of us is smart enough to remember all we know."

  1. Focus on matters of substance; do not test for trivia. If test questions hinge on the specific wording of a definition, then students will prepare for tests by memorizing definitions.
  2. The questions stem should present a clear, concise reflection of the problem and should contain a verb. Avoid distracting clutter in the stem.
  3. The question stem should contain as much of the question as possible; include in the stem any words that would otherwise have to be included in each of the alternatives.
  4. Make sure the question has one "correct," or "best," answer and let students know whether it is the "correct" answer you seek or the "best" answer. Avoid using throw-away distracters or obviously wrong distracters.
  5. Avoid providing clues to the right answer through giveaways such as the length of an option (the longest is often correct), verbal cues, grammatical phrasing (such as parallel constructions), or use of words such as "always" or "never."
  6. Avoid negative statements in the stem; if you must pose the question in a negative way, bold-face or underline the negative word. Avoid the use of double negative when combining the stem and option.
  7. Use only sparingly the options "All of the above," "None of the above," and subset alternatives (such as "A and B"). With "All of the above," students sometimes select option A, the first correct answer, then go to the next question.
  8. Mix up the location of the correct answer from question to question. Avoid patterns even if they are just the result of your random selection process.
  9. Rather than providing graphs on the exam, ask questions that require students to know the necessary graphs. I tell my students beforehand that the exam will supply no graphs even though there will be questions that require an understanding of graphs.
  10. Mix up the type of questions asked and the level of difficulty. Some questions should challenge your best students.

Above all, remember that you are testing students' knowledge of economics, not their verbal skills. Foreign students have particular problems untangling the wording of needlessly complicated multiple-choice exams. During the exam, you want students to think about economics, not try to divine sentence construction.

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Grapevine

William A. McEachern, Editor
Stephen M. Miller John Virkler
John Neal William J. Field
John Jascot Charles W. Johnston
Eric K. Steger Paul Taperek
John Henzel Duncan Tye

Stephen M. Miller of the University of Connecticut, Storrs, plays what he calls "The Billionaire Game" to help introduce time preference, life-cycle consumption patterns, and other time-related ideas. Here are the rules. Each student must at the outset surrender any personal assets, but each receives a billion dollars to spend over a lifetime, provided each earns no income (from work, interest, dividends, or any other income source). Each student also knows the exact date of his or her death, and any money not spent at that time reverts to the benefactor. After explaining the rules, Professor Miller draws three charts on the board representing increasing, decreasing, and constant lifetime spending patterns. In each case the area under the spending stream totals $1 billion. Students then vote on the preferred consumption pattern. The chart with the declining consumption pattern usually wins by a wide margin. After the vote, the instructor can discuss questions such as why interest rates reward those who forego present consumption, how the actual consumption pattern over a lifetime combines elements from the three patterns voted on, and why student would bother going to college if they prefer present to future consumption.

John Neal of Lake Sumter Community College in Leesburg, Florida, notes that inflation is merely a change in the length of the financial measuring rod. So why would this change pose problems for decision makers? To answer that question he draws an analogy between unanticipated inflation and an arbitrary change in the length of a yardstick. He asks students to consider how a textile manufacturer might be affected by an arbitrary change in the length of the basic unit of measurement in that industry, the yard. How would such a change affect machinery settings, the quantity ordered, and the amount produced? Professor Neal sensationalizes his question by dramatically breaking a wooden yardstick "into as many pieces as strength permits." He then discusses the specific planning difficulties posed by unanticipated inflation.

John Jascot of Capital Community-Technical College in Hartford, Connecticut, says he gets especially excited teaching students about the relationship between production and cost. After developing the three stages of the total product curve, he goes through the various types of short-run costs. To show the transition from production to cost, he draws a transparency of the total product curve and holds it up to the class. Then he flips it over so that output appears on the horizontal axis instead of on the vertical axis. He has integrated this transition with spreadsheets, which helps address "what it?" questions.

Eric K. Steger of East Central University in Ada, Oklahoma discusses a rise in the minimum wage as follows. Suppose the minimum wage is set above the equilibrium wage. The result is unemployment in this market. But he notes that those unemployed at the minimum wage often work in jobs such as baby-sitting that pay less than the minimum. His point it that, while unemployment may increase somewhat with a rise in the minimum wage, the distortion created by the minimum wage is reduced if workers accept jobs below the minimum.

John Henzel of Athens Area Technical Institute in Athens, Georgia, toured Russian last year, and in class he now shows slides from his trip that contrast economic life in Russia with life in the United States. Also, in his macro course he assigns a paper "Why I am an economic policy activist or nonactivist (or some combination of the two)."

To explain price discrimination, John Virkler of Chowan College in Murfreesboro, North Carolina, discusses the different ticket prices at baseball games, such as ladies night and lower prices for little leaguers in uniform and for those in military uniform. The Richmond Braves, to boost Sunday attendance, offered discounts for those bringing that week's church or synagogue bulletin. As an example of diminishing marginal utility, he points out that even if baseball games were free, most people would not go to games seven days a week.

As another example of price discrimination, William J. Field of Depauw University in Greencastle, Indiana, notes the variety of products around the campus that are sold at a student discount. He sent along an add for a bed and breakfast that offers students a 40% discount. He says that such examples lead to a discussion of the price elasticity of demand.

Charles W. Johnston of the University of Michigan, Flint, recommends the following study idea, which he picked up years ago while studying the psychology of learning. As a student, he found that reviewing his notes right before going to sleep was quite useful. He claims that while we sleep, our brains process this information, learn it, and store it for future reference. He thinks that learning while sleeping is quality study time, with no interruptions.

Paul Taperek of south Florida Community College in Avon Park, Florida, scans the daily newspaper for articles that tie into the week's class objectives. He duplicates these articles to provide students with material for class discussions. He says this moves economics beyond theory and into practice. Duncan Tye of Western Carolina University in Cullowhee, North Carolina, does the same thing and, in addition, gives students a series of questions to answer.

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Odds and Ends

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The Evidence File

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