Abstract
Some researches have been made on the medical service price indexes. We are going to clarify what problems those researches have, especially on the causes of increasing price indexes. First, we newly worked out price indexes that reflect price and technological changes. Second, using them, we classified the increase rates of scores on diagnostic tests by on-screen projection into several factors. The results have shown that half of the increase comes from the widespread-use of expensive high technologies and that the rising number of the aged is not a principal factor.
