The NHS reforms introduced on 1 April 1999 were intended to remove competit
ion and promote co-ope ration. in the delivery of health care. This was to
be achieved in part by the develop ment of joint working by groups of Gener
al Practitioner (GP) practices covering populations of around 100,000-known
as Primary Care Groups (PCGs). A Key element is the integration of respons
ibility for managing both the clinical and financial aspects of delivering
health care. The authors report on. the success of this new joint role, bas
ed on findings from a national survey. There are trade-offs in choosing the
scale at which to encourage GPs to take on their new roles. Smaller groups
will be better able to integrate practices' clinical and financial respons
ibilities, while larger groups will have less financial risk due to random
variation.