I. Introduction, 503. — II. Basic postulates of choice, 505. — III. Wants vs. utility, 510. — IV. Structure of wants, 513. — V. Wants and choice, 518. — VI. Indifference and substitutability, 521. — VII. Choice and psychological threshold, 523. — VIII. Choice and risk, 524. — IX. Choice and uncertainty, 527. — X. Concluding remarks, 531.

Introduction, 125. — I. The theory of consumer's choice, 126. — II. Four qualifying postulates, 128. — III. The constancy of economic laws, 133. — IV. Determinateness of consumer equilibrium, 134. — V. Conclusion, 138.