Restricted tests for testing independence of time to failure and cause of failure in a competing-risks model

We consider the competing-risks problem without making any assumption concerning the independence of the risks. Maximum-likelihood estimates of the cause-specific hazard rates are obtained under the condition that their ratio is monotone. We also consider the likelihood-ratio test for testing the proportionality of two cause-specific hazard rates against the alternative that the ratio of these two hazard rates is monotonic. This testing problem is equivalent to testing independence against likelihood-ratio dependence of the time to failure and the cause of failure in the competing-risks setup. We allow for random censoring on the right. The asymptotic null distribution of the test statistic is obtained and is found to be of the chi-bar-square type. The problem is extended to the case of more than two risks. A numerical example is given to illustrate the procedure.     

National Differences in the Diffusion and Design of Technological Innovation: The Role of Inter-Organizational Networks

This paper reports results from a study of the design and diffusion of computer-aided production management (CAPM) technologies across four European countries (UK, France, The Netherlands and Sweden). The study combined surveys of members of professional operations management associations in each of these four countries and interviews with operations managers and technology suppliers (software suppliers and consultants). The findings revealed significant differences across countries in the design and diffusion of CAPM. For example, in the UK and France highly objectified 'best practice' technologies, supported by standardized software, had diffused more widely than in Sweden and The Netherlands, where solutions tended to be developed in-house and customized to the local context. This paper explains these findings in terms of differences in the structure and operation of these four professional association networks. These differences in inter-organizational networking encouraged different types of knowledge-sharing related to the design of CAPM in the four countries.     

Student-workers and tourist-workers as urban labour: temporalities and identities in the Australian cosmopolitan city

ABSTRACT

Ethnic and cultural difference have long been regularly encountered and produced in Australian cities. However, these processes have predominantly been understood through the lens of permanent ‘settler’ migration. Recent migration policies are seeing increasing numbers of transnational workers residing in Australia with various noncitizen statuses and uncertain temporal horizons. Among these are student-workers and tourist-workers, who, although constructed through transient mobilities of education and leisure travel, play increasingly important roles in Australian cities as migrant labour. Drawing on fieldwork with student-workers and tourist-workers in Melbourne and Sydney, this paper seeks to examine how the temporal and legal status of these mobile subjects is entangled in complex ways with particular sites of production, consumption and labour within the cosmopolitan urban environment. It looks in particular at how the identities of student-workers and tourist-workers are constructed through specific temporal and spatial boundaries within urban space as well as how they are implicated within hierarchies of labour and spaces of cosmopolitan consumption. This highlights some of the complex socio-spatial relationships between and citizen and noncitizen subjects both within and across ethnic boundaries in the cosmopolitan city.     

This Harlem life: black families and everyday life in the 1920s and 1930s

This article uses Probation Department files to reconstruct the lives of five ordinary residents of Harlem. It highlights what that black metropolis offered those outside the political and cultural elite, who have dominated historical scholarship, showing how ordinary blacks negotiated the challenges of life in northern neighborhoods, and drew on institutions and organizations, to establish and sustain new lives. We offer the kind of individualized perspective on everyday life that other scholars have provided for high culture, but which does not exist for other realms of existence in Harlem, even in early twentieth century sociological studies of black life. Where scholars seeking to distinguish the neighborhood from a slum have pointed to the prevailing pride and self-confidence of its residents, this article directs attention to more immediate, concrete supports that sustained and enriched life in Harlem. Relationships with spouses, children, siblings and cousins sustained individuals faced with the social reality of living in overcrowded, deteriorating, disease infested housing, subject to the racism of white police, politicians and employers; so too did friendships made in nightclubs, speakeasies, dances and movie theatres, and membership of churches, fraternal organizations, social clubs, and sports clubs and teams.     

Illuminating urban street (u)topias

ABSTRACT

A utopian vision of the city is often bright, well-lit, and conversely darkness and night are more often associated with dystopia. This paper uses an ethnographic study of night-time in a busy street space in the middle of a south coast UK city in order to demonstrate the application of ‘utopia as method’, or rather utopia as a mobile method in understanding justice and injustice in urban space. In doing so, we suggest the possibilities of urban mobile space, arguing that ‘utopia as method’ originates in Lefebvre’s (1991) work on the possibilities that arise from the seemingly impossible imaginings of urban transformation. We use what are considered to be distinct approaches to photography: ‘ethnographic’ and ‘expressive’ in demonstrating this. Photography tells a story of the lighting of the space in illuminating the street in particular ways and making visible aspects that otherwise may go unnoticed. We draw from the boundaries, of photography (and therefore light), of method, and of urban space, looking to the ‘territorial edges’ for Lefebvre’s possibilities.     

Brokering International Education and (re)producing Class in Mumbai

This article discusses the role that education brokers play in the decision‐making processes of international students in Mumbai, India. Drawing on 80 interviews with students and education brokers, the analysis reveals how the services that brokers provide, and who accesses them, are shaped by the class status of prospective international students within the localized and granular hierarchies of Mumbai's upper‐middle‐class. Brokers are divided into agents and counsellors, who offer different service models and draw their clientele from two distinct segments of the upper‐middle‐class: “South Mumbai elites” and “suburban strivers”. Within these subtly differentiated landscapes of brokerage, advice from brokers can make certain students vulnerable, or hierarchise specific study destinations and trajectories. This article argues that attending to granular class differentiation within international education brokerage illuminates inequalities that exist within student cohorts from the same locality. It also outlines the policy implications of these inequalities in both sending and receiving countries.     

Reputation in Rupture: Broken Alliances and Relational Politics in the Roosevelt-Taft Split

Under what circumstances do close allies sacrifice their unity? By what process do bonds break? Although it might be argued that political ruptures are determined by incommensurable ideas (policies, philosophies) or by contentious personalities (temperament, character), we argue that neither explanation is sociologically sufficient. Extending the theories of interpersonal ruptures of Diane Vaughan and Robert Emerson to political domains, we take a relational approach to politics by emphasizing the centrality of the availability of reputational information, networks of supporters, and public displays of antagonism in response to affronts within systems of institutional power. Our approach to public ruptures draws on a detailed case study: the broken alliance between presidents Theodore Roosevelt and William Howard Taft, a dramatic instance of changing master-protégé relationship. The transition from close interpersonal alliance to public distaste typically involves four stages that expand a relational breach to an irreparable rupture: (1) personal grievance, (2) substantive disagreement, (3) public awareness, and (4) network activity. While every detailed case has limits, we note comparable instances and contend that this model applies broadly to broken partnerships in politics or other public domains.