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Technology as a ‘major driver’ of health care costs: a cointegration analysis of the Newhouse conjecture[J] . Albert A. Okunade,Vasudeva N.R. Murthy.Journal of Health Economics . 2002 (1)
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Aggregate health care expenditure in the United States: evidence from cointegration tests[J] . N. R. Vasudeva Murthy,Victor Ukpolo.Applied Economics . 1994 (8)

