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Click to increase image sizeClick to decrease image size Additional informationNotes on contributorsJohn F. ChizmarJohn F. Chizmar and Anthony L. Ostrosky are professors of economics at Illinois State University, Normal, Ill. The authors wish to thank Lon Carlson, Mark S. Walbert, Peter Kennedy, and two anonymous referees for particularly helpful criticisms of earlier drafts of this article.
Chizmar et al. (Thu,) studied this question.