1. MAY 1990 of the actual cost, roughlv 44"YO were overestimates, and 241N, were underestimates. With respect to individual products t tests showed no significant differences in the average cost estimates of the Grampian
2. MAY 1990 the efficiencv of prescribing. Overestimating the cost of cheap drugs and underestimating the cost of expensive ones may bias general practitioners' choices towards higher cost products, thus inflating the NHS drugs bill. A future paper will investigate the relation between general practitioners' perceptions of costs and their prescribing patterns
3. The role of perceived price in physicians' demanid for diagnostic tests;Med Caret,1983
4. Pthysicians' kilowledge of cost: the casc ot diagnostiC tests;Inquziry,1976
5. Prestribi'ng costs: a studs otf Scostish general practirtioners' altitudes aind knowledge. AberdeCn: Universitv ot Aberdectl;Ryan, A.M.; Yulc, B.; Botid, C.; Tavlor, R.,1989