Nonexperimental Quantitative Research
نویسنده
چکیده
منابع مشابه
Propensity scores for confounder adjustment when assessing the effects of medical interventions using nonexperimental study designs.
Treatment effects, especially when comparing two or more therapeutic alternatives as in comparative effectiveness research, are likely to be heterogeneous across age, gender, co-morbidities and co-medications. Propensity scores (PSs), an alternative to multivariable outcome models to control for measured confounding, have specific advantages in the presence of heterogeneous treatment effects. I...
متن کاملCan Nonexperimental Estimates Replicate Estimates Based on Random Assignment in Evaluations of School Choice? A Within-Study Comparison
The ability of nonexperimental estimators to match impact estimates derived from random assignment is examined using data from the evaluation of two interdistrict magnet schools. As in previous within-study comparisons, nonexperimental estimates differ from estimates based on random assignment when nonexperimental estimators are implemented without pretreatment measures of academic performance....
متن کاملA Quantitative Examination of the Relationship Between Perceived Job Satisfaction and Organizational Commitment in Small Business Employees in the Lynchburg Metropolitan Statistical Area By
The Lynchburg Metropolitan Statistical Area (MSA) has an average turnover that exceeds the national and regional average. Organizational turnover unfavorably influences productivity and has the potential to adversely affect, not only the Lynchburg MSA, but also the regional, state, and national economy. This quantitative nonexperimental, correlational research examined the relationship between ...
متن کاملHow Close Is Close Enough? Testing Nonexperimental Estimates of Impact against Experimental Estimates of Impact with Education Test Scores as Outcomes
In this study we test the performance of some nonexperimental estimators of impacts applied to an educational intervention—reduction in class size—where achievement test scores were the outcome. We compare the nonexperimental estimates of the impacts to “true impact” estimates provided by a random-assignment design used to assess the effects of that intervention. Our primary focus in this study...
متن کاملMethods for Policy Analysis
The ability of nonexperimental estimators to match impact estimates derived from random assignment is examined using data from the evaluation of two interdistrict magnet schools. As in previous within-study comparisons, nonexperimental estimates differ from estimates based on random assignment when nonexperimental estimators are implemented without pretreatment measures of academic performance....
متن کامل