In this article, we examine how issues of multi-category membership (hybridity) were handled during the evolution of one of the first general systems of industrial classification in the United States, the credit rating schema of R. G. Dun and Company. Drawing on a repeated cross-sectional study of credit evaluations during the postbellum period (1870–1900), our empirical analyses suggest that organizational membership in multiple categories need not be problematic when classification systems themselves are emergent or in flux and when organizations avoid rare combinations or identities involving ambiguous components. As Dun's schema became institutionalized, boundaries between industries were more clearly defined and boundary violations became subject to increased attention and penalty by credit reporters. Our perspective highlights the utility of an evolutionary perspective and tests its implications for the salience of distinct mechanisms of hybridity.

This article examines residential vacancy patterns in Buffalo, NY, using data from a unique data set. It includes variables from HUD Aggregate USPS Administrative Data on Address Vacancies, the American Community Survey (ACS) 5‐year estimates for 2005–2009, housing choice voucher (HCV) records of local public housing agencies, and municipal in rem property records. Multiple regression is used to identify significant relationships between vacancy patterns, socioeconomic characteristics, and institutional factors. The findings from this analysis suggest that the percent of vacant residential properties increases in census tracts with elevated poverty rates, higher percentages of renters receiving rental assistance, and long‐term vacancies. They also suggest that the percent of abandoned residential properties increases in census tracts with highly concentrated black populations, elevated poverty rates, long‐term vacancies, and higher percentages of business addresses. We conclude that these relationships are unique to older core cities experiencing systemic population and job losses. These cities struggle with a distinct type of long‐term vacant and abandoned structures, which we label zombie properties. They can be contrasted with vacant and abandoned properties in transitional or regenerating areas. We offer recommendations for further analysis of zombie properties in these urban settings.

Clear consensus on the clinical evaluation of acute skin toxicity among cancer patients undergoing radical radiotherapy (RT) is currently lacking. This study investigates the reliability and validity of a new Skin Toxicity Assessment Tool (STAT) to evaluate the objective and subjective manifestations of RT-induced acute skin effects. The STAT was designed by a multidisciplinary team involved in the management of radiation skin reactions. The tool has 3 components: patient and treatment parameters, observer scoring, and patient-reported symptoms, and was piloted in a cohort of 27 breast cancer patients by pairs of independent blinded observers. Each patient was assessed weekly during RT and 2 weeks after therapy completion. Validity and reliability testing of the STAT was performed. Information on the tool's ease of use was obtained by recording the time necessary to complete the assessment at each visit and by a survey among the tool's users. All subjects developed some degree of skin reaction during breast RT. The level of agreement between observers in eliciting subjective complaints ranged from 72% to 92% (95% CI = 63-96%; kappa = 0.33-0.68). The interobserver agreement in scoring skin reactions ranged from 65.0 to 97.5% (kappa = 0.46-0.81). Objective and subjective toxicity scores were significantly correlated (P < 0.05). The STAT was easy to use and required on average a few minutes to complete at each visit. The STAT is an easy-to-use, standardized instrument to evaluate acute skin reaction and may be applied to clinical care and research in patients undergoing radiotherapy.

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AF patients discharged on warfarin were frequently prescribed concomitant medications that increase bleeding risks. These patients should be closely monitored and counseled to watch for signs of bleeding.