Viewed from the perspective of demand, health care differs from ordinary consumer goods in several important respects:
Uncertainty
Idiosyncratic patient needs ความต้องการที่แปลกไปจากปกติ
Asymmetry of information ความเหมาะสมของข้อมูล
The inseparability of diagnose and treatment and the resulting dual role of physicians
Complex price structure of health care