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.[page needed]
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.[better source needed] 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."[self-published source]
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."
- "Obituary: Milton I. Roemer, Pioneering UCLA Health Services Professor and Professional Who Defined Health Policy in U.S., Abroad". University of California, Los Angeles School of Public Health. 8 January 2001. Archived from the original on 4 March 2012.
- Shain, M; Roemer, MI (April 1959). "Hospital costs relate to the supply of beds". Modern Hospital. 92 (4): 71–3. PMID 13644010.
- Bovbjerg, Randall (1978). "Problems and Prospects for Health Planning: The Importance of Incentives, Standards, and Procedures in Certificate of Need". Utah Law Review. 83.
- "Roemer's Law of Demand". Opus1 Journal: The Journal of Undergraduate Research. 7 September 2005. Archived from the original on 7 January 2009.
- Shafrin, Jason (12 October 2006). "Roemer's law". Healthcare Economist.[self-published source]
- Powell, Enoch (1966). A new look at Medicine and Politics. Retrieved 1 July 2015.
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