How can a model of demand for hospital care be used to explain changes in hospital utilization over time?

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How can a model of demand for hospital care be used to explain changes in hospital utilization over time?

Question Description

What are the various consequences if hospital planning in the United States is done according to need (or the use of bed-to-population ratios) rather than demand? How can a model of demand for hospital care be used to explain changes in hospital utilization over time?
125 words