An adaptive sequential Monte Carlo method for approximate Bayesian computation

Approximate Bayesian computation (ABC) is a popular approach to address inference problems where the likelihood function is intractable, or expensive to calculate. To improve over Markov chain Monte Carlo (MCMC) implementations of ABC, the use of sequential Monte Carlo (SMC) methods has recently been suggested. Most effective SMC algorithms that are currently available for ABC have a computational complexity that is quadratic in the number of Monte Carlo samples (Beaumont et al., Biometrika 86:983?C990, 2009; Peters et al., Technical report, 2008; Toni et al., J.?Roy. Soc. Interface 6:187?C202, 2009) and require the careful choice of simulation parameters. In this article an adaptive SMC algorithm is proposed which admits a computational complexity that is linear in the number of samples and adaptively determines the simulation parameters. We demonstrate our algorithm on a toy example and on a birth-death-mutation model arising in epidemiology.     

Making the locational choice: A case approach to the development of a theory of offshore outsourcing and internationalization

Offshore outsourcing is one of the most sustained management strategies of the 21st century, and researchers are paying attention to this contemporary, yet complex and controversial phenomenon. Despite the increasing amount of research, from the theoretical and managerial perspectives several important aspects remain inconclusive. The focus in this article is on theory development in two complex areas. The first concerns the location, the idea being to identify the factors that influence the final decision, in which ownership is not the mode of control. Secondly, the aim is to explore whether offshore outsourcing facilitates international expansion. Through a process of theoretical rationalization and inductive case analysis propositions are arrived at according to which non-locational factors most heavily impact the firm's decision to outsource offshore and its subsequent internationalization. The results indicate that this subsequent internationalization may be a by-product of offshore outsourcing, or it may be an intentional strategy. The article thus adds new aspects to the existing theory on outsourcing decision-making, which forms the basis of an emergent theory for future academic research.     

Social Movements and Europeanization Processes: The Case of the French Associations Mobilizing around the Asylum Issue

This paper seeks to analyse the process of Europeanization of social movements mobilizing around the asylum policy since the middle of the 1990s. Taking the example of the principal French associations which have mobilized on this topic, the paper explores the dynamics that lead these associations to increasingly address the European institutions since the launching of the process of harmonisation of asylum policies. In particular, it shows that particular attention shall be given to the relationship between the associations that have constituted at the national level and the set of actors that are mobilized on this issue exclusively at the European level (which is defined as a European advocacy coalition). Through the analysis of this relationship, it can be seen that the French associations follow different processes of Europeanization. Some follow a process of inclusion into the existing European advocacy coalition while others create alternative mobilizations at the European level. This study allows us to observe and to analyse the similarities and differences in the interactions between social movements and institutions in the national political space and in the European political space on this particular issue. In doing so, it seeks to present an original perspective on a process of ‘Europeanization from below’. This research is based on the in-depth analysis of 11 associations which are representative of the diversity of the movement related to the asylum issue in France. It uses different methods that were developed in social movements studies: frame analysis, protest-event analysis and network analysis. It is based on several sources: associative discourses and publications, in-depth interviews, and associative internal literature.     

Fortress Europe’s far-flung borderlands: ‘Illegality’ and the ‘deportation regime’ in France’s Caribbean and Indian Ocean territories

ABSTRACT

This article argues that the French overseas territories of the Caribbean and Indian Ocean, which are also European ‘outermost regions,’ make up the first borders of ‘Fortress Europe,’ geographically, historically and legislatively. Since the 1980s, a set of laws, described as ‘laws of exception,’ place the majority of the foreign residents in a state of ‘illegality.’ These overseas territories are in the vanguard of a French ‘regime of deportation’ that targets foreign nationals, indigenous populations and former colonial subjects. They are places of experimentation for legal exceptions, which are then implemented in metropolitan France. This paper will analyze how the reinforcement of borders contradicts the popular and scholarly representation of the Caribbean and the Indian Ocean as sites of mobility.     

When outsourcing fragments: customer creativity and technological transmutations

One of the most fundamental decisions made in firms is about what functions or activities the firm should perform within its own hierarchy, and which of these it should rely on the market to perform. Outsourcing is ‘an agreement in which one company contracts out a part of their existing internal activity to another company’. However, this article contends that outsourcing has changed, and is changing in ways that make the application of neat, legal and technically correct definitions hard to use, and even harder to apply in strategy. Under the new outsourcing paradigm, technology is not a passive ‘substance’, rather it is an active ‘force’. We aim to look at the ways in which technologies are re-shaped and transmuted by consumers. Through this analysis, we add the consumer activity to the conventional definition of outsourcing. We focus on one of the most highly anticipated and influential new products of 2007 – the Apple iPhone.     

Organization of the planning department in a divisionalized concern

This article is based upon an assignment carried out by the author concerned with organization for planning in a company formed as a result of a merger. Possible organizational solutions are discussed and the recommendations of the author and his colleague outlined.