COMPETING AUCTIONS

This paper shows that larger auctions are more efficient than smaller ones, but that despite this scale effect, two competing and otherwise identical markets or auction sites of different sizes can coexist in equilibrium. We find that the range of equilibrium market sizes depends on the aggregate buyer‐seller ratio, and also whether the markets are especially thin. (JEL: D44, L11)     

A Comparative Analysis of VHA,Non-VHA,and Overall Outpatient Treatment Use Intensity Among Older U.S. Veterans Denied or Awarded VA Service-Connected Disability Compensation

Poorer health is often associated with greater healthcare use among the general population. In contrast, while many veterans denied VA disability compensation ("denied applicants") are as impaired as those awarded VA disability compensation ("awarded applicants"), studies suggest that these veterans may nevertheless utilize less VHA healthcare. Whether they concurrently utilize less non-VHA, and overall healthcare, however, remains a critical, unresolved issue. The 2001 National Survey of Veterans was used to examine VHA, non-VHA, and overall outpatient healthcare treatment use intensity during the previous 12 months among veterans denied or awarded VA disability compensation. Results: Denied applicants were significantly more likely than those awarded to have not used any VHA outpatient healthcare during the previous 12 months (OR=2.45, 95% CI: 1.24, 4.81). Moreover, while not statistically significant, point estimates consistently suggested that denied may have concurrently used more non-VHA, and overall outpatient healthcare than awarded. It appears veterans denied VA disability compensation are forgoing VHA outpatient healthcare services, perhaps in favor of non-VHA outpatient healthcare services. While this result may be consistent with the intent of VA service-connected disability policy, further analysis is necessary to confirm adequate access to healthcare for denied veterans.     

Cryotherapy for treatment of ECT-induced headache

Because headache is a common side effect of electroconvulsive therapy (ECT), this study sought to determine the effectiveness of cryotherapy (i.e., a frozen gel band) in relieving pain in patients with post-ECT headaches, and whether headache intensity and physiological measurements could predict use of an alternative analgesic (rescue medication). We used a quasi-experimental, crossover design to collect data from 31 patients ages 24 to 85 who had been referred for ECT at two medical facilities in San Diego, California. Measurements of patients' pain intensity were made at three intervals: upon perceiving headache, and at 30 and 60 minutes following the cryotherapy or acetaminophen interventions, based on the order of the crossover design. Data were analyzed using Hotelling's T2 and logistic regression. No significant difference was found between cryotherapy and acetaminophen in relieving ECT-induced headaches (p = .420). There was no influence due to the crossover design (p = .313), nor where there significant changes in physiological measures from treatment (p = .420). Logistic regression showed that 50% of patients required rescue medication after 60 minutes for both treatments (R2 = .498, p = .001), and 66% required rescue medication based on pain level and physiological measures (R2 = .662, p < .008). Based on these results, cryotherapy is an alternative treatment that may be helpful to some patients with ECT-induced headaches.     

Gambling on an alternative revenue source: The impact of riverboat gambling on the charitable gambling component of nonprofit finances

This article examines the impact of casino gambling in and around Illinois on charitable gambling in that state. The research targets the impact of casino gambling on one of the vital revenue sources of many nonprofit organizations. Charitable gambling represents the most widespread form of legalized gambling in the United States. Net income from charitable gambling totaled an estimated $1.3 billion in 1997. Despite its apparent importance in providing an alternative revenue stream to nonprofit organizations, in a growing number of states charitable gambling operations must compete with an increasing number of private for‐profit gambling enterprises, including riverboat and land‐based casinos, Indian gambling operations, and pari‐mutuel wagering venues. As a result, there is interest in the extent to which forprofit gambling is crowding out charitable gambling—and in the process reducing funds (such as receipts from gambling operations) available to nonprofit organizations. The data analysis presented in this article suggests that spending on casino gambling in Illinois and in bordering areas of Indiana, Iowa, and Missouri may be displacing consumer expenditures on charitable gambling.     

A Class of Non-Gaussian State Space Models With Exact Likelihood Inference

The likelihood function of a general nonlinear, non-Gaussian state space model is a high-dimensional integral with no closed-form solution. In this article, I show how to calculate the likelihood function exactly for a large class of non-Gaussian state space models that include stochastic intensity, stochastic volatility, and stochastic duration models among others. The state variables in this class follow a nonnegative stochastic process that is popular in econometrics for modeling volatility and intensities. In addition to calculating the likelihood, I also show how to perform filtering and smoothing to estimate the latent variables in the model. The procedures in this article can be used for either Bayesian or frequentist estimation of the model’s unknown parameters as well as the latent state variables. Supplementary materials for this article are available online.     

Aligning Chemical Assessment Tools Across the Hazard-Risk Continuum

With the growing number and diversity of hazard and risk assessment algorithms, models, databases, and frameworks for chemicals and their applications, risk assessors and managers are challenged to select the appropriate tool for a given need or decision. Some decisions require relatively simple tools to evaluate chemical hazards (e.g., toxicity), such as labeling for safe occupational handling and transport of chemicals. Others require assessment tools that provide relative comparisons among chemical properties, such as selecting the optimum chemical for a particular use among a group of candidates. Still other needs warrant full risk characterization, coupling both hazard and exposure considerations. Examples of these include new chemical evaluations for commercialization, evaluations of existing chemicals for novel uses, and assessments of the adequacy of risk management provisions. Even well-validated tools can be inappropriately applied, with consequences as severe as misguided chemical management, compromised credibility of the tool and its developers and users, and squandered resources. This article describes seven discrete categories of tools based on their information content, function, and the type of outputs produced. It proposes a systematic framework to assist users in selecting hazard and risk assessment tools for given applications. This analysis illustrates the importance of careful selection of assessment tools to achieve responsible chemical assessment communication and sound risk management.     

Patterns of Compensatory Behaviors and Disordered Eating in College Students

Abstract. Objective: The current study investigated rates of endorsement of eating-related compensatory behaviors within a college sample. Participants: This sample included male and female students (N = 1,158). Methods: Participants completed the Eating Disorder Examination Questionnaire (EDE-Q). The study defined 3 groups of students: those who did not endorse purging behaviors, those who endorsed only exercise, and those who endorsed laxative use or vomiting. Rates of related eating disorder risk variables were compared across the 3 groups. Results: Almost half of college students reported utilizing exercise as a compensatory strategy over the past 28 days. Those reporting compensatory exercise did not differ from other community and college samples on EDE-Q subscales. Conclusions: Findings suggest that college students report significant rates of compensatory exercise, and those who report exercise as their only compensatory behavior also report relatively low levels of eating disorder risk.     

Role for the Psychologist in Childbirth Preparation

A survey was conducted among 152 new mothers who had been trained in psychoprophylaxis to assess the need for psychologists to become involved in childbirth preparation. The results indicated that there was a demand for psychologists to enter this field. A role for the psychologist was suggested in terms of education; participation in the health team by way of assessment and psychotherapy with pregnant women; providing emotional support for selected women during labour; leading groups for prospective parents which aimed at promoting personal emotional growth; and doing research in this field.