Review of Regression Models for Categorical Dependent Variables Using Stata by Long and Freese

The new book Long and Freese (2001) is reviewed. Copyright 2002 by Stata Corporation.categorical data, regression models

Distributed anonymous function computation in information fusion and multiagent systems

We propose a model for deterministic distributed function computation by a network of identical and anonymous nodes, with bounded computation and storage capabilities that do not scale with the network size. Our goal is to characterize the class of functions that can be computed within this model. In our main result, we exhibit a class of non-computable functions, and prove that every function outside this class can at least be approximated. The problem of computing averages in a distributed manner plays a central role in our development

Distributed anonymous discrete function computation

We propose a model for deterministic distributed function computation by a network of identical and anonymous nodes. In this model, each node has bounded computation and storage capabilities that do not grow with the network size. Furthermore, each node only knows its neighbors, not the entire graph. Our goal is to characterize the class of functions that can be computed within this model. In our main result, we provide a necessary condition for computability which we show to be nearly sufficient, in the sense that every function that satisfies this condition can at least be approximated. The problem of computing suitably rounded averages in a distributed manner plays a central role in our development; we provide an algorithm that solves it in time that grows quadratically with the size of the network

Continuous-time average-preserving opinion dynamics with opinion-dependent communications

We study a simple continuous-time multi-agent system related to Krause's model of opinion dynamics: each agent holds a real value, and this value is continuously attracted by every other value differing from it by less than 1, with an intensity proportional to the difference. We prove convergence to a set of clusters, with the agents in each cluster sharing a common value, and provide a lower bound on the distance between clusters at a stable equilibrium, under a suitable notion of multi-agent system stability. To better understand the behavior of the system for a large number of agents, we introduce a variant involving a continuum of agents. We prove, under some conditions, the existence of a solution to the system dynamics, convergence to clusters, and a non-trivial lower bound on the distance between clusters. Finally, we establish that the continuum model accurately represents the asymptotic behavior of a system with a finite but large number of agents.Comment: 25 pages, 2 figures, 11 tex files and 2 eps file

Employee participation in Europe:in search of the high participative workplace in Europe

This report presents an overview of practices on participation schemes in companies in different European countries. It is based on a secondary analysis of the 1996 EPOC-mail survey data among managers of profit-sector establishments in ten EU countries. The paper offers a description of the diversity of the extent and nature of participative workplaces in European countries. Hence, it analyses the interrelationships between several forms of participation schemes and indicators for the participative nature of the workplace: schemes for direct participation (DP) of employees, i.e. group consultation and individual and group delegation; schemes for financial participation (FP), i.e. employee ownership and profit sharing; and the arrangements for indirect, employee representative participation (ER). Based on a multivariate analysis of the intensity of participation schemes, a profile of high participative workplaces is presented. Typifying these workplaces we focused on country factors, management practices and workplace characteristics

Fall back proper equilibrium

Proper equilibrium plays a prominent role in the literature on non-cooperative games. The underlying thought experiment in which the players play a passive role is, however, unsatisfying, as it gives no justification for its fundamental idea that severe mistakes are made with a significantly smaller probability than innocuous ones. In this paper, we introduce a more active role for the players, leading to the refinement of fall back proper equilibrium