1. O. D. Dickerson, Health Insurance (Homewood, Ill.: Irwin, 1959), p. 333.
2. O. W. Anderson (with J. J. Feldman), Family Medical Costs and Insurance (New York: McGraw-Hill, 1956).
3. H. S. Denenberg, R. D. Eilers, G. W. Hoffman, C. A. Kline, J. J. Melone, and H. W. Snider, Risk and Insurance (Englewood Cliffs, N.J.: Prentice Hall, 1964), p. 446.
4. The following quote, again taken from an insurance textbook, shows how far the medical insurance market is from perfect competition:...insurance companies must screen their applicants. Naturally it is true that many people will voluntarily seek adequate insurance on their own initiative. But in such lines as accident and health insurance, companies are likely to give a second look to persons who voluntarily seek insurance without being approached by an agent. (F. J. Angell, Insurance, Principles and Practices, New York: The Ronald Press, 1957, pp. 8–9.)
5. T. W. Schultz, The Economic Value of Education (New York: Columbia University Press, 1964), p. 42.