Choice of Parametric Accelerated Life and Proportional Hazards Models for Survival Data: Asymptotic Results

We discuss the impact of misspecifying fully parametric proportional hazards and accelerated life models. For the uncensored case, misspecified accelerated life models give asymptotically unbiased estimates of covariate effect, but the shape and scale parameters depend on the misspecification. The covariate, shape and scale parameters differ in the censored case. Parametric proportional hazards models do not have a sound justification for general use: estimates from misspecified models can be very biased, and misleading results for the shape of the hazard function can arise. Misspecified survival functions are more biased at the extremes than the centre. Asymptotic and first order results are compared. If a model is misspecified, the size of Wald tests will be underestimated. Use of the sandwich estimator of standard error gives tests of the correct size, but misspecification leads to a loss of power. Accelerated life models are more robust to misspecification because of their log-linear form. In preliminary data analysis, practitioners should investigate proportional hazards and accelerated life models; software is readily available for several such models.     

The project coordinator's problem

A project coordinator has a set of activities with known durations and values which are available for scheduling within a given horizon. There may be both precedence and corequisite restrictions (two activities are corequisites if scheduling one implies the other must be scheduled). The project coordinator's problem is to select the activities to be scheduled, and their start times, so as to maximize the net value of the project when there is no penalty for failing to schedule an activity. An efficient solution procedure is developed and illustrated and several generalizations are discussed.     

Subnational Location Capital: The Role of Subnational Institutional Actors and Socio‐spatial Factors on Firm Location

Firms do not simply locate, but rather seek to accrue location‐based advantages such as knowledge, market insidership and resource utilization. Adopting the lens of social capital, this paper explores how subnational institutional actors facilitate location capital for firms. Using qualitative case study analysis of six multinational companies (MNCs), we highlight the important role of subnational institutional actors in fostering three dimensions of subnational location capital – structural, relational and cognitive. We show that subnational location capital, defined as the economic and social assets accessible through relationships within a subnational location, enable firms to derive advantages via subnational engagement. These findings contribute to the growing literature on the dynamic interaction of firms with subnational location, particularly the nuanced role of subnational institutional actors with MNCs.     

North Americans' Attitudes Toward Illegal Drugs

Public opinion polls conducted from 1969 to 2003 found a variety of opinions on the use, possession, and legalization of marijuana. Public opinion about legalizing marijuana use is increasing, but it is also increasing toward harsher penalties for those who possess a small amount of marijuana. Public opinion regarding the legalization of illegal drugs appears to be influenced by the times. The majority of Americans increasingly believe that the country has made some progress in dealing with the problems of illegal drugs, but Americans are also reporting more difficulty within their families related to marijuana. This article examines trends based in public opinion polls on the use of marijuana in the United States and Canada and discusses the social and political history of marijuana and the biophysical effects, medical uses, definitions, and previous research related to marijuana.     

Media, ‘Fat Panic’ and Public Pedagogy: Mapping Contested Terrain

Discourses regarding a ‘global obesity crisis’ and alternative frames (e.g. weight‐inclusive approaches to health) have proliferated through various media of communication. These media range from traditional print and visual formats (e.g. newspapers and television shows) to digital media (e.g. Twitter, Facebook, YouTube), which enable different publics to produce, and not just consume, text, images and other data relating to the body. Reflecting a sociological understanding of educational practices as extending beyond formal schooling, mediated obesity discourse and counter‐movements have also been conceptualised as public pedagogies, which instruct people how to relate to their own and other's bodies, health and subjectivities. This article examines what is critically known about various media at a time when governments and agencies are reinvigorating the global war on obesity, with populations being ‘advised’ to become and remain conscientious weight watchers. In conclusion, the article underscores the salience of social studies of the media when seeking to rethink obesity, incorporating critical reference to moral panic theory and the need to better understand what media can ‘do’ as enactments of public pedagogy.     

Global Centrality and Income Inequality in U.S. Metropolitan Areas: A Test of Two Hypotheses

This article provides a quantitative assessment of two global city hypotheses: Sassen’s polarization and Hamnett’s professionalization claims. We conduct our analysis by using a continuous measure of global city status developed by researchers at the Global and World Cities Research Network (GaWC) and examining its correlation with the Gini index of household income inequality with relevant controls across a large sample of U.S. metropolitan areas in 2008. We examine industrial employment distribution as a causal pathway by which global city formation may influence urban income structures, as per Sassen and Hamnett’s original hypotheses. Results show that global city status is consistently associated with higher levels of inequality, but neither theorist’s claims about causal mechanisms are supported. This begs the question: What explains the correlation? We suggest an alternative hypothesis relating global city status to the distribution of educational credentialing.     

The Madoffization of Irish society: from Ponzi finance to sociological critique

Financialization and neoliberal policy created the Celtic Tiger. This economic ‘miracle’ furthered creditors’ and property developers’ speculative interests, leading to an unstable financial pyramid that eventually imploded in 2008 with catastrophic consequences for Irish society. Using the sociological imagination as social critique, this paper offers a lens on fictitious capital and Ponzi finance in the context of Ireland's boom and bust. Critique is advanced using the Madoffization of society thesis, a sociological heuristic that draws formal comparisons between Bernie Madoff's US$65 billion Ponzi scheme, which collapsed in 2008, and financialized capitalism. The Madoff case exhibits five main elements or forms which, it has been argued, underlie the varying content of life on a much broader scale: accumulation by debt expansion, mass deception, efforts to maintain secrecy and silence, obfuscation, and scapegoating. In conclusion, a crucial difference between the Madoff case and the Madoffization of Irish society is underscored. Discussion also moves from critique to hope amidst calls to renew sociology and transform financialized capitalism.     

A short term forecasting model for R & D expenditures

Whenever budget requests for individual R & D projects contain a built-in contingency then this will result in inefficient use of scarce resources. At the end of the year the annual budget may have been fully allocated but not necessarily fully utilized. This can result in delays or even complete cancellation of other proposed R & D projects because of an apparent lack of funding.The objective of the study was to forecast monthly R & D expenditures with a better accuracy than available from the subjective estimates of individual project leaders. The method described in this paper proved to be successful in practice.