E=PXQ Hypotheses to explain rising expenditures: Prices have increased Quantity demanded has increased Technological innovations and technological overuse Rest of this chapter explores each one of these hypotheses Bhattacharya,Hyde and Tu-HealthEconomicsBhattacharya, Hyde and Tu – Health Economics E = P x Q  Hypotheses to explain rising expenditures:  Prices have increased  Quantity demanded has increased  Technological innovations and technological overuse  Rest of this chapter explores each one of these hypotheses