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Evaluation II Outcomes Cost benefit & effectiveness
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Outcomes Dependent on the goals Multiple goals, do they compete Multiple stakeholders Development of measurable outcomes that reflect program goals If the measurements do not reflect the goals, then they are not useful
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Outcomes A goal may have one than one measure (indicator) In evaluation research there are often multiple measures of several outcomes Need to identify the IV and then multiple measures of the DV
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Example: Manhattan Bail Project Use of a prediction instrument to release arrestees on their own recognizance Goals: relieve jail overcrowding, presence at trial, protect public safety, decrease costs Measures: % ROR % that appear at hearing
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Example % released ROR that abscond or commit new crimes (public safety) Costs of the program minus the amount saved by successful RORs Might be successful in one sense but not in another
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Evaluation designs Experiment: randomly assign subjects to different treatment groups, i.e., intervention/no intervention Example: random assignment to EM with home detention and home detention without EM (control) Logic of experiments
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Experiments Must ensure that the treatment is delivered, i.e., is home detention enforced? Is the EM equipment working properly? This is a matter of monitoring, and must be established before evaluating treatment effects What is the DV? How will outcomes be measured? Rearrest rates? Other? Depends on goals
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Experiments Treatment integrity and program delivery are important—if they are problematic, then outcomes cannot be evaluated Monitoring, making sure that program is being followed
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Quasi-experiments Random assignment is often not possible Sometimes feasible for programs/services, but may be restricted for legal or political reasons Random assignment typically not possible for evaluation of laws or some policies
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Quasi-experiments Due process, equal protection issues Example: drug court participants could probably not be randomly assigned, must look at the group as a whole Violates the logic of experiments—is any change in the DV due to the IV, or to something else (extraneous)?
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Quasi-experiments Ex post evaluations: an evaluation sometime after a program has gone into effect Full coverage programs—everyone is subjected to some treatment/IV, there is no control Example: graduated license law in Missouri (how to evaluate)
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Quasi-experiments Treatment units such as neighborhoods IV in some areas, not in areas Uncontrolled variables, such as the actions of individuals within the neighborhoods Target and comparison areas Usually fear of crime and crime rates
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Quasi-experiments Non-equivalent control group designs No random assignment Attempt to select an experimental and comparison group that are as similar as possible Can assess this by measuring both groups on important variables and determining if there are differences
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Quasi-experiments Time series designs Interrupted time series designs Measure before and after an intervention is introduced Repeat in other settings, other times, other subjects Single series design—introduce and then remove the intervention
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Quasi-experiments Time series design with switching replications Combination of the two—can do a single series design in one location and then introduce it in another Example: helmet laws lead to reduction in motorcycle theft Checked for displacement to cars, bikes
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Cost benefit Costs of the intervention compared to the money potentially saved Manhattan bail project, costs of the program compared to money saved when the arrestees are not jailed (costs of jail for estimated specified periods of time) Other potential savings (wages, taxes)
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Cost benefit Sometimes the cost benefits may be calculated on a long term basis Unfortunately the government is not necessarily responsive to this argument, as they operate on a more short term basis Example: costs of corrections (prisons) vs community corrections
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Cost benefit Boot camp evaluations: aside from other outcomes, (i.e., recidivism), do boot camps save money?) Are inmates deterred/rehabilitated/punished in a shorter period of time? More inmates could be processed at a faster, less expensive rate
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Cost benefit In this example, note the potential dangers of net widening Is money saved by performing the intervention in the long run? Major argument that advocates of prevention programs must use in order to sell programs
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Cost effectiveness Costs of the program compared to the non-monetary outcomes A program might be cheaper but outcomes might not be better (or even worse, or with unanticipated unwanted side effects) Community corrections: cheaper, recidivism rates not different
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Cost effectiveness If recidivism is not higher, is the program effective? What are the other issues? Punitiveness or deterrence (individual, general)? Effect on inmates who avoid prisonization? These are potential outcomes that are nonmonetary in nature
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Cost effectiveness There could be justice issues (i.e., if offenders who have committed murder are released because they are low risk) Example of release of offenders who have “aged out” of crime Weighing cost benefit and cost effectivess
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Costs and benefits How effective and what effects, must a program have to be “worth” it? Value judgments Political issues Effects of restricting handguns Mandatory jail sentences for abortion protestors
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Costs and benefits Policies concerning drugs, drug law sentences Racial profiling Local example of pornography Does a program work—obviously there are stakeholders who want it to work Many issues in evaluation
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