A study of the market for optometrists' services in the 1960s showed that

Question

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The study found that the average price of eyeglasses would be reduced if legal restrictions on advertising by optometrists were removed. This suggests that the restrictions were limiting competition among optometrists, leading to higher prices for consumers. Option A is incorrect as it states that all states prohibited advertising by optometrists, which is not supported by the information given. Option B is also incorrect as the study did not provide information on the opinions of professional optometrists on advertising restrictions. Option D is incorrect as the study did not mention advertising on eyeglasses specifically.

A Study of the Market for Optometrists' Services in the 1960s