I. Introduction: widespread use of community indifference curves, 1. — II. Attempts to justify the use of community indifference curves, 3. — III. Proof of the nonexistence of community indifference contours, 4. — IV. Nature of Scitovsky's community indifference contours, 6. — V. Problem of family preference: a parable, 8. — VI. Optimal ways of achieving income redistribution, 12. — VII. Regular properties of social indifference contours, 14. — VIII. Perfect competition and bliss, 19. — IX. Final summary, 21.

I. Introduction and review, 537. — II. Many-goods model, 539. — III. Euler necessary conditions, 541. — IV. Case of satiated production, 544. — V. Physical analogy of small vibrations, 547. — VI. Case of utility satiation, 549. — VII. Practical computation, 553. — VIII. Hamiltonian formulation, 554. — IX. Pay-off in terms of initial state, 559. — X. Conclusion, 561.