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In health policy, Roemer's Law may be expressed as follows: "in an insured population, a hospital bed built is a filled bed" This rule was deduced by the American health services researcher Milton Roemer, working at the UCLA School of Public Health. Roemer and colleagues found a positive correlation between the number of short-term general hospital beds available per 1,000 population and the number of hospital days used per 1,000 population. Whilst clearly Roemer's Law will not always hold true (not every bed that is ever built will be filled), it does provide the underpinning for certificate of need laws and for health planning. The law is thought to be a consequence of induced demand i.e. physicians encouraging patients to consume services that the patients would not have chosen had they been fully informed. Health planning and certificate of need laws aim to prevent the waste that would otherwise occur due to Roemer's Law. "One problem in this finding is that it could be the case that hospital stays are shorter in lower hospital bed per capita regions because of a deficit in supply (reverse causation). An increased number of beds may be due to patient preference for in-patient (rather than outpatient) care in a region." Enoch Powell who was Minister of Health in the United Kingdom propounded a similar proposition, which he called Parkinson's Law of hospital beds: "the number of patients always tends to equality with the number of beds available for them to lie in." ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Roemer's law」の詳細全文を読む スポンサード リンク
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