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Table 12.3ContinuedStudyOutcomeTreatmentTreated/controlsCommentsCurrie and Hotz(2004)Childhood accidentrequiring medical attentionChild care regulationsAged 0–4/aged 5–9Davidoffet al.(2005)Employer-sponsoredinsurance coverageReforms of state regulationsof small group insurancemarket in USInteracts indicators forreform with high/low riskand small/large firmsUses DD and DDD estimateswith repeated cross-sectionsDawsonet al.(2007)Waiting times inophthalmologyLondon patient choiceexperiment (LPCP)LCPC hospitals/threecomparator groups: allhospitals in rest of England;a matched control group; allhospitals from four largemetropolitan areasDD combined with PSM.The results show a smallreduction in average waitingtimes and reduced dispersionwithin the LPCP hospitalsDranoveet al.(2003)Health care expendituresand health outcomes forpatients receiving coronaryartery bypass graft (CABG)Mandatory CABG reportcard laws adopted in NewYork State in 1991 andPennsylvania in 1993Hospitals affected byreform/hospitals in otherstatesUse DD estimators in bothhospital level and patientlevel analyses. Find anadverse effect of report cardson outcomes, due to thepatient selection theyinduce. The validity of theDD strategy is assessed byusing a cohort of acutemyocardial infarction (AMI)patients who, as emergencyadmissions, should not besubject to patient selectionDusheikoet al.(2006)Admissions to hospital(chargeable elective,non-chargeable elective andemergency)Abolition of GP fundholdingin England(Ex-)fundholders/non-fundholdersFind that abolition offundholding increasedadmissions