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2. The Physiocrats. Six Lectures on the French Économistes of the Eighteenth Century. By Henry Higgs. (New York: The Macmillan Co. 1897. Pp. x, 158.)
3. The Economic Effects of Employment Regulation: What Are the Limits?;John Addison;Government Regulation of the Employment Relationship,1997
4. The Fair Wage-Effort Hypothesis and Unemployment;George Akerlof;105 Quarterly Journal of Economics,1990