How do heat and flood risk drive residential green infrastructure implementation in Phoenix,Arizona?

Urban Ecosystems - Green infrastructure is an increasingly popular strategy to simultaneously address challenges associated with urbanization and global environmental change, including increased...     

Dealing with noncompliance and missing outcomes in a randomized trial using Bayesian technology: Prevention of perinatal sepsis clinical trial,Soweto, South Africa

The success of interventions designed to address important issues in social and medical science is best addressed by randomized experiments. With human beings there are often complications, however, such as noncompliance and missing data. Such complications are often addressed by statistically invalid methods of analysis, in particular, intention-to-treat and per-protocol analyses. Here we address these two complications using a statistically valid approach based on principal stratification with a fully Bayesian analysis. This analysis is applied to a randomized trial of a potentially important intervention designed to reduce the transmission of bacterial colonization between mothers and their infants through vaginal delivery in South Africa: the Prevention of Perinatal Sepsis (PoPs).     

Cross‐Section Regression with Common Shocks

This paper considers regression models for cross‐section data that exhibit cross‐section dependence due to common shocks, such as macroeconomic shocks. The paper analyzes the properties of least squares (LS) estimators in this context. The results of the paper allow for any form of cross‐section dependence and heterogeneity across population units. The probability limits of the LS estimators are determined, and necessary and sufficient conditions are given for consistency. The asymptotic distributions of the estimators are found to be mixed normal after recentering and scaling. The t, Wald, and F statistics are found to have asymptotic standard normal, χ², and scaled χ² distributions, respectively, under the null hypothesis when the conditions required for consistency of the parameter under test hold. However, the absolute values of t, Wald, and F statistics are found to diverge to infinity under the null hypothesis when these conditions fail. Confidence intervals exhibit similarly dichotomous behavior. Hence, common shocks are found to be innocuous in some circumstances, but quite problematic in others. Models with factor structures for errors and regressors are considered. Using the general results, conditions are determined under which consistency of the LS estimators holds and fails in models with factor structures. The results are extended to cover heterogeneous and functional factor structures in which common factors have different impacts on different population units.     

Risk preferences and changes in background risk

We present two theorems that yield necessary and sufficient conditions for first- and second-degree stochastic dominance deteriorations of background risk to increase risk aversion with respect to foreground risk. We require that any change in a foreground risk that is undesirable remains so after a background risk changes in a way that is either unfair, undesirable in the sense of reducing expected utility, or undesirable in the sense of increasing expected marginal utility. Our results thus characterize utility functions that are, respectively, vulnerable, proper, or standard with respect to changes in background risk.

The Role of Distrust in Offshore Safety Performance

Trust is recognized as a potentially important factor in safety within high-risk industries. However, little detailed empirical research has explored how trust operates in these contexts to influence worker safety performance. The present study addresses this by (i) identifying the target (occupational group) in which trust is most important for good safety, and (ii) establishing the "type" of trust (trust or distrust) with the greatest impact on safety performance. A questionnaire survey of 203 UK offshore gas workers' attitudes of trust and distrust toward four occupational groups (workmates, supervisors, offshore managers, and contractors) and an operating company was conducted. Logistic regression analysis identified attitudes toward offshore management as the strongest predictor of safety performance at an industry level. At an installation level, safety performance was best predicted by attitudes toward contractors and workmates. Further analysis revealed attitudes of distrust as better predictors of safety performance compared to attitudes of trust. These findings suggest that safety professionals should pay more attention to the role of distrust in safety performance. They also suggest that safety initiatives should target attitudes toward specific groups for optimal effectiveness.     

A cross-cultural comparison of death anxiety: a brief note

Data are reported from samples of undergraduates around the world who have been administered Templer's Death Anxiety Scale. Data from 24 American samples and from 16 nations were identified. Strong sex differences were found and an association between the scores of men and women.     

A Periodic Inventory Model for Stocking Modular Components

We study the benefit obtained by exploiting modular product design in fulfilling exogenous demand for both a complete assembly and its components in a service parts inventory system. Our goal is to reduce overall service system costs by allowing assembly and/or disassembly (A/D) to occur at some unit cost per A/D action. In an extensive set of computational experiments, we compare a naïve stocking and operating policy that treats all items independently and ignores the modular product structure and related A/D capability to the optimal base stock policy, and to a policy that allows A/D from the naïve stocking levels. While extensive computational analysis shows that the optimal base stock policy improves the system cost between 3 to 26% over the naïve approach, simply allowing A/D from the naïve stocking levels captures a significant portion (an average of 67%) of the naïve–optimal gap. Our computational results demonstrate that the optimization shifts the component‐assembly mix from the naïve levels and that limiting A/D capacity affects this mix. Limiting A/D capacity can actually increase the expected number of A/D actions (versus the uncapacitated case), since the optimization shifts stocking levels to reduce the probability that “too many” actions will be required.     

DIALOGUES OF THE NATIONS: Revisiting Visions and Its Critics

Critics of Visions in this symposium raise three general questions. The question of inclusiveness is addressed by linking pertinent criteria to the book's aims; that of justifying national traditions by reviewing pertinent evidence; and that of the viability of dialogue by arguing that responsive communication does not entail full agreement. A number of particular issues the critics raise are addressed by the book's arguments regarding the relation of the discipline of sociology to its philosophical background, the international setting of early sociology, Durkheim's individualism, Weber's distinction between naturalism and interpretability, Marx's treatment of Feuerbach and of nationalism, and the relation between power and knowledge. This response concludes by explicating the proposal that the time may be ripe to rejoin a number of the elements of Aristotelian social science that had been delegated to various national traditions of social theory in the modern era.     

The Service Brand as Relationships Builder

This article examines the appropriateness of the notion and application of relationship marketing in various contexts. Theoretical and conceptual similarities between the broad notions of ‘the brand’ and of relationship marketing as risk reducers, simplifiers of choice and guarantee of quality are uncovered. We put forward a notion of relationship marketing as a further step in the branding process, whereby whenever perceived risk and consumer involvement are high, relationship marketing acts as a supplementary tool enabling consumers to maintain cognitive consistency and psychological comfort. Experts' opinions regarding branding in a service context expanded on these concepts. Especially for more intangible offerings, such as financial services, the experts stressed the use of corporate brand identity as the basis of relationship building both inside and outside the organization and as a means to achieve differentiation and provide the focus for homogeneous and consistent service delivery. Finally, we suggest the concept of the service brand as a holistic process beginning with the relationship between the firm and its staff and coming alive during the interactions between staff and customers.     

Racial Difference in the Determinants of Smoking Onset

The large differences in youth smoking behavior across ethnic and racial groups are often overlooked in debates about prevention. This study examines how the determinants of the onset of smoking vary by race and ethnicity. Academic success is strongly associated with lower smoking rates among white youth, but this is not as true for Hispanics and African-Americans. Cultural assimilation may be an important determinant of smoking for Hispanics. Price increases do not appear to reduce smoking onset among white youth, but the results provide some support that higher prices will reduce smoking among Hispanic and African-American youth.