infonet-economy

Statistical problems in modelling personal income distributions include estimation procedures, testing, and model choice. Typically, the parameters of a given model are estimated by classical procedures such as maximum likelihood and leastsquares estimators. Unfortunately, the classical methods are very sensitive to model deviations such as gross errors in the data, grouping effects...

Inequality measures are often used fot summarise information about empirical income distributions. However, the resulting picture of the distribution and of changes in the distribution can be severely distorted if the data are contaminated. The nature of this distortion will in general depend upon the underlying properties of the inequality measure. We investigate this issue...

Cell, a model for strongly Distributed Object Based systems is discussed. Its components, the nucleus and the membrane, are presented and their characteristics are described. The notions of trading and type transparency in the context of the Cell model are described and issues related to their design and implementation are presented.

We present a number of concepts and hypotheses concerning the impact of the political opportunity structure on the mobilisation pattern of new social movements in Western Europe. The hypotheses refer to the general level of mobilisation in a given country, the general forms and strategies of action employed, the system level at which mobilisation is typically oriented and the...

We introduce a model for information systems specification which covers the spaces of data, semantic contexts, events, objects life-cycle, integrity constraints, and operating periods. For each one of these space we define a structure and its interpretation that allow to specify this particular aspect of the system. In this approach data and event structures are independent. It is...

In this paper we address the effective use of the object-oriented programming approach for concurrent programming from a language design viewpoint. We present a set of requirements for the design of concurrent object-oriented languages. We then use a particular language, Hybrid, as a concrete example and examine to what extent its features meet these requirements. We identify the...