The Educational Choice Anomaly for Principles Students: Using Ordinary Supply and Demand Rather than Indifference Curves
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1 University of Colorado From the SelectedWorks of PHILIP E GRAVES July, 2011 The Educational Choice Anomaly for Principles Students: Using Ordinary Supply and Demand Rather than Indifference Curves PHILIP E GRAVES, University of Colorado at Boulder ROBERT L SEXTON, Pepperdine University LAUREN CALIMERIS, University of Colorado at Boulder Available at:
2 The Educational Choice Anomaly for Principles Students: Using Ordinary Supply and Demand Rather than Indifference Curves Philip E. Graves Department of Economics, UCB 256 University of Colorado Boulder, CO Robert L. Sexton Division of Social Science Pepperdine University Pacific Coast Highway Malibu, CA Lauren Calimeris Department of Economics, UCB 256 University of Colorado Boulder, CO Revised, October 2010 Electronic copy available at:
3 Abstract The surprise value of many economic observations makes our discipline quite interesting for many students. One such anomaly is that providing free education in an effort to reduce the number of dropouts can often result in a lower level of educational quality purchased. This result is easy to show with indifference curves, but many instructors of introductory courses do not introduce this analytical technique. As a consequence, a result that many students find quite interesting is seldom presented. We show here that it is easy to clarify the educational choice anomaly with ordinary supply and demand curves. Moreover, the exercise of doing so provides students with a greater understanding of benefit/cost analysis as well as consumer and producer surplus. Key words: Educational choice, dropouts, subsidized education JEL cods: A1, A2, D1, I2,I3 Electronic copy available at:
4 I. Introduction The educational choice anomaly, that providing education for free can result in less of it actually being chosen, is often intriguing to students. The freely provided public option alters the incentives for selecting among the following educational choice possibilities: to drop out, to remain in public schools when dropping out would have occurred in its absence, to attend the public school when a better quality education would have been acquired in its absence, or to turn down the public option, despite it being free. The last two options are the most interesting to students, since they offer a measure of surprise value. Instructors often present this anomaly in an indifference curve analysis (see Browning and Zupan 2009, p , McCloskey 1985, p 42-45, and Friedman 1976, 65-75), though they rarely present it in the principles setting with ordinary supply and demand curves. We believe this is unfortunate as such an illustration is not only instructive, but it enhances a broader understanding of how supply and demand works in interesting, discrete choices. In Section II, we provide the typical indifference curve presentation. In Section III, we demonstrate how easy and informative it is to gain the same insights with an ordinary supply and demand analysis. Section IV provides a brief summary and conclusion. II. The Educational Choice Anomaly: Indifference Curves Figure 1 presents the typical indifference curve application to public education. We take the quantity of education to be fixed at the high school diploma level, focusing the analysis on the quality of education attained. Figure 1 illustrates the initial equilibrium for the four cases mentioned in the introduction. The vertical axis represents spending on All Other Goods (AOG), while the horizontal axis represents spending on quality of education. The initial budget constraint is represented by the straight line 1 from AOG max to E max. U D represents an indifference curve for those who will drop out in all cases (e.g., education is a bad ). U L,, and U H represent the indifference curves for those with low, medium, and high values of quality of education. In the absence of publicly provided education, both those for whom education is a bad and those with low values of education will drop out. Meanwhile, those with medium and high values will graduate with E M and E H quality levels, respectively. 1 For simplicity, the budget constraint is illustrated as a straight line assuming that educational quality can be increased at a constant price.
5 All Other Goods (AOG) AOG max U D Publicly Provided Education U L AOG M U M1 U M0 U H 0 E G E M E H BC E max Quality of Education (fixed quantity) Figure 1. Indifference Curve Analysis of the Educational Quality Choice To decrease the number of dropouts, the government provides a public option at a quality level of E G which is free to all, financed by taxes (e.g. property taxes) that are unrelated to the educational quality decision. The budget constraint is then the point Publicly Provided Education (for those accepting this option) or the traditional budget constraint for those turning down the public option. Those for whom education is a bad will drop out in either circumstance; however, those with low values of education will no longer drop out and will graduate with E G quality of education 2. The interesting and surprising cases are for those with medium and high values of education. Despite it being free, those with high values of education will turn down the public option and will consume at E H > E G, where E H represents a private schooling quality level. The case of most interest to students, however, is that of those possessing medium educational values. When the public option is provided, these individuals will actually consume a lower quality of education, E G < E M, because that option yields a higher level of utility, indicated by The typical instructor might justify the policy of providing public education with arguments detailing the positive externalities associated with education, such as lower crime rates and/or 2 The higher indifference curve associated with the selection of the public option is shown only for those with a medium value for education for simplicity.
6 unemployment levels for high school graduates versus dropouts. Students find these discussions quite interesting, and the indifference curve apparatus might appear crucial to the understanding they obtain. For instructors not employing indifference curve analysis in their principles courses, the discussion of educational choice possibilities is typically avoided altogether. III. The Educational Choice Anomaly: Supply & Demand Curves Illustrating the educational choice anomaly with supply and demand curves is a simple exercise which has the potential to benefit principles students greatly. Figure 2 presents the graphical representation. Let P E be the equilibrium price of quality of education. Let D D be the demand curve for those for whom education is a bad. Likewise, D L, D M, and D H are the demand curves for those with low, medium, and high values for educational quality, respectively. Price H A P H M B P M C J P E D K P E L F N G P L 0 I Q D L E G E M D M E H D H Quality of Education (fixed quantity) D D Figure 2. Supply & Demand Analysis of the Educational Quality Choice In absence of public education, those with low value will drop out, while those with medium and high values for education will consume E M and E H qualities, respectively. The consumer surplus, as depicted in Figure 2, is zero for those with low value. For those with medium value, it is represented by areas C+D+K. For those with high value, it is represented by areas A+B+C+D+J+K.
7 To decrease the number of dropouts, the government supplies E G, a free option paid for by taxes unrelated to education. Those with low value will no longer drop out and will obtain a high school diploma with quality E G. Their gain in consumer surplus is illustrated by areas G+I in Figure 2. Those with medium value will now consume a lower quality of education, E G < E M. Their welfare increases since the loss in consumer surplus associated with lower quality education (area K) is more than offset by the gain (F+G+I) associated with the free public option. Those with high value will turn down the public option in favor of private schooling and will continue to consume E H. If they were to consume the free education, they would lose areas J+K and gain F+G+I. Since J+K>F+G+I, they are better off turning down the public education option in favor of the higher quality private school. IV. Conclusions Students are almost universally intrigued by the finding that providing something free can actually result in less of it being consumed than would be if a positive price were paid. This anomaly ultimately stems from the fact that the choices are mutually exclusive one either accepts the fixed amount offered for free or refuses it and buys his optimal quantities/qualities. The educational choice case, a clear illustration of this phenomenon, is well suited for indifference curve applications. Since indifference curves are often ignored in introductory economics courses, beginning students may not be exposed to the anomaly. We provide an easy to comprehend supply and demand analysis of the educational choice anomaly in a discrete choice world 3. The anomaly is well suited for a supply and demand application, enhancing student understanding of discrete choice in this framework. Additionally, students benefit through a greater understanding of welfare analysis analyzed in terms of consumer and producer surplus. References Browning, E.K. and M.A. Zuppan Microeconomics: Theory and Applications. 9 th Edition. Hoboken, NJ: John Wiley and Sons. Friedman, M Price Theory. Chicago: Aldine. McCloskey, D The Applied Theory of Price. 2 nd Edition. NY: Macmillan. 3 For simplicity, we ignore non-discrete possibilities that are relevant in real-world contexts, such as accepting the public option but supplementing it with after-school enhancement classes or tutoring.
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