Hospital CostsCosts and Cost AnalysisHealth Care CostsEconomics, HospitalLength of StayCost AllocationHospital ChargesCost ControlHospitals, UniversityCost of IllnessHospitals, TeachingDrug CostsCost-Benefit AnalysisDiagnosis-Related GroupsHospital Bed Capacity, 500 and overHospital Bed CapacityHospital PlanningHospitalizationCost SavingsInsurance, Health, ReimbursementHospitals, UrbanDirect Service CostsHospitals, GeneralFinancial Management, HospitalRetrospective StudiesUnited StatesInsurance, HospitalizationModels, EconomicIntermediate Care FacilitiesHospitals, ProprietaryMedicareNursing Staff, HospitalAccountingHospitalistsPatient AdmissionAncillary Services, HospitalHospitals, PediatricEconomic CompetitionProspective StudiesHospitals, DistrictPatient ReadmissionHospitals, SpecialMulti-Institutional SystemsCritical PathwaysRecovery RoomOperating RoomsHealth ResourcesInpatientsOwnershipEconomics, MedicalBed OccupancySurgical Procedures, ElectiveHealth Facility ClosureHospitals, PrivateTime FactorsPatient DischargeEmergency Service, HospitalModels, EconometricProspective Payment SystemHealth ExpendituresIntensive Care UnitsAcademic Medical CentersOutcome Assessment (Health Care)Postoperative ComplicationsHospitals, CommunityCost SharingUtilization ReviewCross InfectionHospital DepartmentsHealth Services ResearchQuality of Health CareHospitals, PsychiatricAmbulatory Surgical ProceduresHospital UnitsHospital RecordsSurgical Procedures, OperativeInfant, NewbornRegression AnalysisRisk FactorsLaryngeal DiseasesQuality-Adjusted Life YearsEquipment and Supplies, HospitalTreatment OutcomeDatabases, FactualEfficiency, OrganizationalLibraries, HospitalManaged Care ProgramsCohort StudiesVascular Surgical ProceduresRisk AdjustmentOutpatient Clinics, HospitalSurgery Department, HospitalAmbulatory CareMedicaidMultivariate AnalysisFollow-Up StudiesHospitals, CountyHospitalsInsurance, HealthMassachusetts