Physicians' perception of demand‐induced supply in the information age: a latent class model analysis
研究了医生因患者需求增加而提供额外医疗服务（需求诱导供给）的现象，发现医生分为频繁、偶尔和很少三类，其中信息灵通患者比例与频繁或偶尔类型医生的需求诱导供给正相关。
This paper introduces a concept called 'demand-induced supply' that reflects the excess supply of services due to an increase in demand initiated by patients. We examine its association with the proportion of information-savvy patients in physicians' practice. Using data from a national representative physician survey, we apply latent class models to analyze this association. Our analyses categorize physicians into three 'types' according to the frequency with which they provided additional medical services at their patients' requests: frequent, occasional, and rare. The proportion of information-savvy patients is significantly and positively correlated with demand-induced supply for the frequent or occasional type, but not among physicians in the rare type. Efforts to contain healthcare costs through utilization control need to recognize the pattern of responses from physicians who treat an increasing number of information-savvy patients.