Air pollution: I--From pea souper to photochemical smog.

relation to their workload."' Doctors in general practice may be salaried, paid on a capitation basis, or paid per item of service or per patient treated-or they may be paid by a combination of these methods. In the Netherlands, for example, the health insurance schemes fix an earnings target for general practitioners and calculate the capitation payment to provide 70% of this target. The assumption is that each doctor will earn the remaining 30% of the target from private practice, for which payment is made on an item of service basis.