K-Bessel functions associated to 3-rank Jordan algebra

Using Bessel-Muirhead system, we can express the K-bessel function defined on a Jordan algebra as linear combination of the J-solutions. We determine explicitly the coefficients when the rank of this Jordan algebra is three after a reduction to the rank two. The main tools are some algebraic identities developed for the occasion

Securing EU neighborhood - an ideational approach to EU-neighborhood relations

This paper analyses the interrelationship between internal and external security discourses in the field of European Union's neighbourhood policy. The European Union can be observed to actively use security concepts developed in the internal policy-field of Justice and Home Affairs as guiding principles of its foreign policy. This development can be traced at least to the beginning of the enlargement process in the turn of the 1990s. The paper firstly examines how those discourses infuse the new domain of neighbourhood policy that starts to take shape in the early 2000s. It concludes that especially since the European Security Strategy (2003) started to talk of the neighbourhood as a security issue, the policy can be considered to have become an inherent part of the Union's security priorities. Secondly, the paper examines from a theoretical point of view the role of ideas for institutional identity-building. Using the empirical analysis of the neighbourhood discourses as its departure point, the paper considers what this particular type of discourse can tell about the political entity that has emitted it. The research thus rejects the rationalist assumption of separable structure and agency. Instead it subscribes to the discursive institutionalist theory according to which institutions themselves are ideational structures that cannot be treated separately from actors who constitute them. Building its argument on the theses of critical security studies, the work concludes that by conceptualising the neighbourhood in terms of security threat the Union constructs itself as a political community with societal accountability

Intertemporal Substitution in Macroeconomics: Evidence from a Two-Dimensional Labour Supply Model with Money

The hypothesis of intertemporal substitution in labour supply has a history of empirical failure when confronted with aggregate time-series data. The authors show that a two-dimensional labour supply model, adapted to an environment with money as originally proposed by Lucas and Rapping (1969) and Lucas (1972), performs very well. The overidentifying restrictions implied by the model are far from rejected. The estimated parameters of preferences are generally stable and meaningful. Furthermore, the estimated wage elasticities of labour supply are much higher than previously found in the literature.Business fluctuations and cycles; Labour markets; Econometric and statistical methods

Sonic souvenirs: exploring the paradoxes of recorded sound for family remembering

Many studies have explored social processes and technologies associated with sharing photos. In contrast, we explore the role of sound as a medium for social reminiscing. We involved 10 families in recording 'sonic souvenirs' of their holidays. They shared and discussed their collections on their return. We compared these sounds with their photo taking activities and reminiscences. Both sounds and pictures triggered active collaborative reminiscing, and attempts to capture iconic representations of events. However sounds differed from photos in that they were more varied, familial and creative. Further, they often expressed the negative or mundane in order to be 'true to life', and were harder to interpret than photos. Finally we saw little use of pure explanatory narrative. We reflect on the relations between sound and family memory and propose new designs on the basis of our findings, to better support the sharing and manipulation of social sounds