[Bronchitis--a social medical study (author's transl)].
1. Every third or fourth patient visiting an outpatients department for pulmonary diseases was found to have chronic bronchitis. 2. Twice as many manual workers as other workers suffer from chronic bronchitis. This difference seems to be related to the dusty conditions to which manual workers are exposed. Manual workers in clean conditions have the same proportion of chronic bronchitis as non manual workers. 3. Up to the age of sixty there is no difference in the incidence of chronic bronchitis in male and female patients. Above the age of sixty the incidence in males exceeds than in females. 4. No difference between male and female patients up to the age of sixty years is also in regard of the combination of chronic bronchitis and pulmonary emphysema.
Previous estimates of the effects of the Seattle and Denver income maintenance experiments on labor supply indicate that persons eligible for experimental payments reduced their work effort by appreciable amounts. However, these estimates have all been based on data that were self-reported during interviews by participants in the experiment. This paper investigates whether the estimates are biased by differences between treatment and control groups in reporting accuracy. Our results, which utilize employer-reported information on participants' work effort, suggest that the experiment's effects on several categories of Seattle and Denver participants were less adverse than estimates based on self-reported interview data imply.