20 



MULTIPLE PURPOSE RIVER DEVELOPMENT 



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FIGURE 1. The Consumer's Preference Map 



of a desired commodity is to be preferred over a smaller quantity.^ 

 Such a set of indifference curves for two commodities represents a 

 consumer's preference map that can be inferred from his market 

 behavior. Doubtless, each consumer will have many commodities 



' For a more detailed description of the properties and construction of indiffer- 

 ence curves, the interested reader may consult a standard economics text. Two 

 excellent texts of this kind are Scitovsky's Welfare and Competition, ibid.; and 

 Erich Schneider's Pricing and Equilibrium (T. W. Hutchison translation; New 

 York: The Macmillan Company, 1952). 



