The Effects of Advertising Lessons from Optometry

Barriers to New Competition

1957 • 2,906 citations

Econometric Methods, 2nd Ed.

1976 • 504 citations

The Effect of Advertising on the Price of Eyeglasses

1972 • 373 citations

The Distribution of Medical Services before and after “Free” Medical Care — The Quebec Experience

1973 • 136 citations

THE OPTOMETRIC PROFESSION

1968 • 18 citations

Findings of the Harvard Study on the Economic Effects of Advertising

1942 • 11 citations