2011k-368 2018g-248 accounting congresses costcontrol costof deliveryofhealthcare economicaspects economiccompetition economics gesundheitspolitik gesundheitsökonomie governmentpolicy health healthcarecosts healthcarereform healthexpenditures healthpolicy insurance krankheitskosten medical medicalcare medicaleconomics medicalpolicy methods nationalhealthprograms publichealth publichealthadministration quality qualityofhealthcare riskassessment safetymanagement safetymeasures unitedstates universalhealthinsurance