Small-Sample Properties of GMM-Based Wald Tests

This article assesses the small-sample properties of generalized-method-of-moments-based Wald statistics by using (a) a vector white-noise process and (b) an equilibrium business-cycle model as the data-generating mechanisms. In many cases, the small-sample size of the Wald tests exceeds its asymptotic size and increases sharply with the number of hypotheses being jointly tested. We argue that this is mostly due to difficulty in estimating the spectral-density matrix of the residuals. Estimators of this matrix that impose restrictions implied by the model or the null hypothesis substantially improve the properties of the Wald statistics.     

Overwhelming Casualties: Medical Ethics in a Time of Terror

Codes of ethics and ethics guidelines define standards of professional conduct, and ways to prioritize or balance ethical principles when these appear to be in conflict. In 1991 an international and interdisciplinary group of scholars met at the University of Toronto to discuss these problems in a Workshop on Ethical Considerations in Scholarship and Science. A document, “The Toronto Resolution”; (TTR), was developed, providing twelve principles for incorporation into scientific and scholarly codes, with the object of ensuring that professionals in science recognize the potential consequences of their work in the broader social context. To examine the extent to which existing codes are consonant with The Toronto Resolution's 12 principles, a content analysis was conducted on the codes of 21 Ontario‐based scientific and scholarly organizations. Criteria used in the content analysis were standardized and determined to be reliable. Only a weak correspondence was found between the contents of the codes of the scientific and scholarly organizations surveyed here and the principles set out in TTR. In particular, guidelines on specific social issues such as environmental effects or conflict resolution are scarcely mentioned at all. This study encourages consideration of The Toronto Resolution by the ethics committees of scientific and scholarly associations, as codes are revised or as new interpretations of principles in the codes evolve.     

Promoting Self-Efficacy and Self-Esteem for Multiethnic Sexual Minority Youth: An Evidence-Informed Intervention

ABSTRACT

Sexual minority youth face multiple challenges, yet research regarding evidence-informed practice strategies for this population is limited. This study describes the pilot efforts of Strengths First, the first strengths-based intervention created specifically to promote self-esteem and self-efficacy among multiethnic sexual minority youth. A pretest–posttest design was used to gather preliminary data from program participants (n = 162) about the potential effectiveness of the program during a 2-year period that ranged from the inception of the program in June 2008 to September 2010. Significant increases in self-esteem and self-efficacy were found. Implications for social service research and practice are discussed.     

The Effect of Integrated Scheduling and Capacity Policies on Clinical Efficiency

In outpatient healthcare clinics, capacity, patient flow, and scheduling are rarely managed in an integrated fashion, so a question of interest is whether clinic performance can be improved if the policies that guide these decisions are set jointly. Despite the potential importance of this issue, we find surprisingly few studies that look at how the allocation of capacity, paired with various appointment scheduling policies and different patient flow configurations, affects patient flow and clinical efficiency. In this paper, we develop an empirically based discrete‐event simulation to examine the interactions between patient appointment policies and capacity allocation policies (i.e., the number of available examination rooms) and how they jointly affect various performance measures, such as resource utilization and patient waiting time. Findings suggest that scheduling lower‐variance, shorter appointments earlier in the clinic (and, conversely, higher‐variance, longer appointments later) results in less overall patient waiting without reducing physician utilization or increasing clinic duration. Additionally, exam rooms exhibited classic bottleneck behavior: there was no effect on physician utilization by adding exam rooms beyond a certain threshold, but too few exam rooms were devastating to clinic throughput. Some significant interactions between these variables were observed, but were not influential to the level of managerial concern. Clinicians' intuition about managing capacity in healthcare settings may differ substantially from best policies.     

Metropole and Colony: Irish Networks and Patronage in the Eighteenth-Century Empire

This study examines how social networks helped to overcome problems of physical distance in the British Empire during the eighteenth century. In particular, it explores the relationships between ethnicity, patronage and place by focusing on a group of Irish professionals. By piecing together connections between lawyers, merchants and medical doctors in various places including Ireland, London, Jamaica and Senegambia, this essay suggests that Irish networks were flexible enough to allow for dialogue, disagreement and change, but were also durable enough to transcend time and space. These qualities were crucial for sustaining the obligations of patronage that characterised the 'Old Society' of eighteenth-century Britain and generated the means to overcome some practical problems of imperialism.     

Rape in nonhuman animal species: Definitions,evidence, and implications

This paper examines the controversial issue of rape in nonhuman animal species. Many existing studies on nonhuman rape appear to suffer from inappropriate definitions and questionable interpretations. Many existing critiques of these studies are limited by their own misunderstandings of evolutionary theory. An attempt is made to reduce the resulting controversy by defining rape in a way that can be applied to nonhuman animals, without provoking unwarranted implications about human rape. Applying this definition to existing studies indicates that behavior meeting the definition of rape does exist in several nonhuman species. However, comparisons of these species do not provide clear implications for either proximate or ultimate explanations of human rape.