What to Do at Low Doses: A Bounding Approach for Economic Analysis

To quantify the health benefits of environmental policies, economists generally require estimates of the reduced probability of illness or death. For policies that reduce exposure to carcinogenic substances, these estimates traditionally have been obtained through the linear extrapolation of experimental dose-response data to low-exposure scenarios as described in the U.S. Environmental Protection Agency's Guidelines for Carcinogen Risk Assessment (1986). In response to evolving scientific knowledge, EPA proposed revisions to the guidelines in 1996. Under the proposed revisions, dose-response relationships would not be estimated for carcinogens thought to exhibit nonlinear modes of action. Such a change in cancer-risk assessment methods and outputs will likely have serious consequences for how benefit-cost analyses of policies aimed at reducing cancer risks are conducted. Any tendency for reduced quantification of effects in environmental risk assessments, such as those contemplated in the revisions to EPA's cancer-risk assessment guidelines, impedes the ability of economic analysts to respond to increasing calls for benefit-cost analysis. This article examines the implications for benefit-cost analysis of carcinogenic exposures of the proposed changes to the 1986 Guidelines and proposes an approach for bounding dose-response relationships when no biologically based models are available. In spite of the more limited quantitative information provided in a carcinogen risk assessment under the proposed revisions to the guidelines, we argue that reasonable bounds on dose-response relationships can be estimated for low-level exposures to nonlinear carcinogens. This approach yields estimates of reduced illness for use in a benefit-cost analysis while incorporating evidence of nonlinearities in the dose-response relationship. As an illustration, the bounding approach is applied to the case of chloroform exposure.     

Valuation of childhood risk reduction: the importance of age, risk preferences, and perspective.

This article explores two problems analysts face in determining how to estimate values for children's health and safety risk reductions. The first addresses the question: Do willingness‐to‐pay estimates for health risk changes differ across children and adults and, if so, how? To answer this question, the article first examines the potential effects of age and risk preferences on willingness to pay. A summary of the literature reporting empirical evidence of differences between willingness to pay for adult health and safety risk reductions and willingness to pay for health and safety risk reductions in children is also provided. The second dimension of the problem is a more fundamental issue: Whose perspective is relevant when valuing children's health effects—society's, children's, adults‐as‐children, or parents'? Each perspective is considered, followed ultimately by the conclusion that adopting a parental perspective through an intrahousehold allocation model seems closest to meeting the needs of the estimation problem at hand. A policy example in which the choice of perspective affects the outcome of a regulatory benefit‐cost analysis rounds out the article and emphasizes the importance of perspective.     

Analytical approximations for iterated bootstrap confidence intervals

Standard algorithms for the construction of iterated bootstrap confidence intervals are computationally very demanding, requiring nested levels of bootstrap resampling. We propose an alternative approach to constructing double bootstrap confidence intervals that involves replacing the inner level of resampling by an analytical approximation. This approximation is based on saddlepoint methods and a tail probability approximation of DiCiccio and Martin (1991). Our technique significantly reduces the computational expense of iterated bootstrap calculations. A formal algorithm for the construction of our approximate iterated bootstrap confidence intervals is presented, and some crucial practical issues arising in its implementation are discussed. Our procedure is illustrated in the case of constructing confidence intervals for ratios of means using both real and simulated data. We repeat an experiment of Schenker (1985) involving the construction of bootstrap confidence intervals for a variance and demonstrate that our technique makes feasible the construction of accurate bootstrap confidence intervals in that context. Finally, we investigate the use of our technique in a more complex setting, that of constructing confidence intervals for a correlation coefficient.     

How the British Working Class Became White: The Symbolic (Re)formation of Racialized Capitalism

This article offers an explanation of how and why the British working class, from being marginal to white identity in the nineteenth century, came to adopt and adapt this identity in the twentieth century. The changing position of whiteness within the symbolic constitution of capitalism is discussed. More specifically, the transition from whiteness as bourgeois identity within Victorian, relatively laissez-faire, capitalism to whiteness as a popular, or mass, identity, within the more state interventionist capitalism of the twentieth century is used to exemplify the mutable nature, and political complexities, of the relationship between working class and white identities. The paper concludes with some observations on the implications of this argument for the theory and practice of anti-racism.     

Specific Organizational Citizenship Behaviours and Organizational Effectiveness: The Development of a Conceptual Heuristic Device

Organizational citizenship behaviour has generally been associated with organizational effectiveness. However, recent research has shown that this may not always be the case and that certain types of organizational citizenship behaviour such as compulsory citizenship behaviour, may be inimical to the fulfillment of formal goals and organizational effectiveness. Using military historical and business organizational secondary data, the paper maintains that extreme variance in either organizational (task) or personal (social psychological) support organizational citizenship behaviour generates entropic citizenship behaviour which derails completely the effective accomplishment of formal organizational goals. A general model of organizational citizenship behaviour with entropic citizenship behavior as its novel conceptual boundary is developed in the paper, and four specific propositions with implications for future empirical research are delineated.     

Property,gender and the life course: Inheritance and family welfare provision in early nineteenth-century England

Drawing upon detailed research of inheritance practices in early nineteenth-century Stockport, this article examines how married men attempted to provide for their families after their death. It is argued that inheritance acted as an informal family welfare mechanism through which specific gender relations associated with middle-class households were reproduced. The evidence presented suggests that married male testators often used inheritance to try and 'fix' their wives into widowhood. Widows were frequently required to act as custodians of family property and maintain the domestic order. Access to property was carefully controlled and various legal devices were used to give authority to the process and ensure that the estate was used by widows to care and provide for children in certain, carefully stipulated ways. In making these claims, the article argues that recent revisionist studies that have attempted to highlight the proprietorial autonomy of middle-class women in industrializing communities ignore the forces at work which constrained the free use of property by women at certain stages in the life course. The findings of the study are also used to highlight the ways in which middle-class men's uses of property were materially and ideologically 'constrained'.     

CALIBRATING MEASURES OF FAMILY ACTIVITIES BETWEEN LARGE- AND SMALL-SCALE DATA SETS

Two studies of working families are combined to demonstrate a strategy for producing reliable estimates from the combination of self-reported (large N) and observational (small N) data. Both studies examine where and how dual-career families spend time at home. The 500 Family Study is sociological and uses self-reported time diary data from a national sample; the CELF study is anthropological and uses observational scan sampling data from a regional sample of 32 families. The data are combined as if they constitute one sample, and an analytic solution for establishing the reliability of the resulting composite estimates of time use is provided. Merging the data sets provides validation for each study, neither of which is without potential methodological weaknesses. The advantages of combining data from the independent data collection methods are discussed, and selected substantive findings on families' activities are highlighted, illustrating similarities and differences between findings in the independent and combined data sets. Results show that working families spend significant time in a small spectrum of home spaces, particularly kitchens and living rooms, with leisure activities prevailing, but mothers, fathers, and children differ in where and how they spend their time. Overall, a template for merging data from different disciplines and methods is provided.     

Sovereignty at What Scale? An Inquiry into Multiple Dimensions of Food Sovereignty

Abstract

Food sovereignty has struggled to make inroads into changing the structures and processes underlying the corporate food regime. One reason is that scale is still underspecified in the politics, strategies, and theories of food sovereignty. We suggest that much can be learned from examining the multiple dimensions of scale inherent in ongoing food sovereignty struggles. A gap exists between these in vivo experiments and the maturing academic theory of scale. The concept of ‘sovereignty’ can be opened up to reveal that movements, peoples, and communities, for example, are creating multiple sovereignties and are exercising sovereignty in more relational ways. Relational scale can aid movements and scholars to map and evaluate how spatial and temporal processes at and among various levels work to reinforce dominant agri-food systems but could also be reconfigured to support progressive alternatives. Finally, we apply relational scale to suggest practical strategies for realizing food sovereignty, using examples from the Potato Park in the Peruvian Andes.     

'Real Jobs', 'Learning Difficulties' and Supported Employment

Supported employment is now regarded as a major vehicle for enabling people with 'learning difficulties' to enter employment. The purpose of this paper is to use the evidence provided by three case studies of people with 'learning difficulties' who have participated in supported employment to critically examine its fundamental premises. The paper argues that the influences of normalisation theory and the US model of supported employment have combined in the UK to form a variant of supported employment which, in pursuing the concept of 'real job', fails to adequately address the consequences of impairment.