587 research outputs found
Cramming: The Effects of School Accountability on College-Bound Students
This paper is the first to explore the effects of school accountability systems on high-achieving students' long-term performance. Using exceptional data from a large highly-selective state university, we relate school accountability pressure in high school to a student's university-level grades and study habits. We exploit a change in the state's accountability system in 1999 that led to some schools becoming newlythreatened by accountability pressure and others becoming newly-unthreatened to identify the effects of accountability pressure. We find that an accountability system based on a low-level test of basic skills apparently led to generally reduced performance by high-achieving students, while an accountability system based on a more challenging criterion-referenced exam apparently led to improved performance in college on mathematics and other technical subjects. Both types of systems are associated with increased "cramming" by students in college. The results indicate that the nature of an accountability system can influence its effectiveness.
End Game: Ex Parte Seizure Process and the Battle Against Bootleggers
This Article presents a broad overview of the exparte seizure process, what it is and how it can be deployed by trademark owners to shut down counterfeiters. It first discusses the general structure and mechanics of the TCA. It then proceeds to discuss some important areas of practical concern with respect to proceedings under the Act. The Article concludes by providing a hypothetical case study of the ex parte seizure process in action
Association is not causation: treatment effects cannot be estimated from observational data in heart failure
Aims:
Treatment âeffectsâ are often inferred from non-randomized and observational studies. These studies have inherent biases and limitations, which may make therapeutic inferences based on their results unreliable. We compared the conflicting findings of these studies to those of prospective randomized controlled trials (RCTs) in relation to pharmacological treatments for heart failure (HF).
Methods and results:
We searched Medline and Embase to identify studies of the association between non-randomized drug therapy and all-cause mortality in patients with HF until 31 December 2017. The treatments of interest were: angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, beta-blockers, mineralocorticoid receptor antagonists (MRAs), statins, and digoxin. We compared the findings of these observational studies with those of relevant RCTs. We identified 92 publications, reporting 94 non-randomized studies, describing 158 estimates of the âeffectâ of the six treatments of interest on all-cause mortality, i.e. some studies examined more than one treatment and/or HF phenotype. These six treatments had been tested in 25 RCTs. For example, two pivotal RCTs showed that MRAs reduced mortality in patients with HF with reduced ejection fraction. However, only one of 12 non-randomized studies found that MRAs were of benefit, with 10 finding a neutral effect, and one a harmful effect.
Conclusion:
This comprehensive comparison of studies of non-randomized data with the findings of RCTs in HF shows that it is not possible to make reliable therapeutic inferences from observational associations. While trials undoubtedly leave gaps in evidence and enrol selected participants, they clearly remain the best guide to the treatment of patients
Using Goals to Motivate College Students: Theory and Evidence from Field Experiments
Will college students who set goals for themselves work harder and perform better? In theory, setting goals can help time-inconsistent students to mitigate their self-control problem. In practice, there is little credible evidence on the causal effects of goal setting for college students. We report the results of two field experiments that involved almost four thousand college students in total. One experiment asked treated students to set goals for performance in the course; the other asked treated students to set goals for a particular task (completing online practice exams). We find that performance-based goals had no discernible impact on course performance. In contrast, task-based goals had large and robust positive effects on the level of task completion, and task-based goals also increased course performance. Further empirical analysis indicates that the increase in task completion induced by setting task-based goals caused the increase in course performance. We also find that task-based goals were more effective for male students. We develop new theory that reinforces our empirical results by suggesting two key reasons why task-based goals might be more effective than performance-based goals: overconfidence and uncertainty about performance. Since task-based goal setting is low-cost, scaleable and logistically simple, we conclude that our findings have important implications for educational practice and future research
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