Wikipedia, seemingly more than other Web sites, has a rich link structure that seems ripe for analysis. The communities that might exist in Wikipedia may be evident in the network’s structure. This paper investigates the network structure of Wikipedia, and explores the degree to which the community structures map to the tags that del.icio.us users annotate pages with. The extent to which Wikipe...

When informal arguments are presented, there may be imprecision in the language used, and so the audience may be uncertain as to the structure of the argument graph as intended by the presenter of the arguments. For a presenter of arguments, it is useful to know the audience’s argument graph, but the presenter may be uncertain as to the structure of it. To model the uncertainty as to the struct...

The Yarkovsky effect is a weak non gravitational force that can modify the semi-major axis of asteroid. It has an important effect on the long term evolution of Near Earth Asteroids. The aim of this paper is to detect secular drift in the semi-major axis of some asteroids. The datamining can help to detect such a drift by extending the orbital arc. Finally the Yarkovsky effect is also considere...

There is, perhaps, no more visible financial dilemma in the software industry today than that of software piracy. In this paper, we detail the development and empirical validation of a predictive model of software piracy behavior by computer-using professionals. The model was developed from the results of prior research in software piracy and the reference disciplines of the theory of planned b...

For many dose-response studies, large samples are not available. Particularly, when the outcome of interest is binary rather than continuous, a large sample size is required to provide evidence for hormesis at low doses. In a small or moderate sample, we can gain statistical power by the use of a parametric model. It is an efficient approach when it is correctly specified, but it can be mislead...

This article reconsiders the Harsanyi–Sen debate concerning whether Harsanyi is justified in interpreting his Aggregation and Impartial Observer Theorems as providing axiomatizations of utilitarianism. Sen’s criticism and its formalization by Weymark are based on the claim that von Neumann–Morgenstern utility theory is ordinal, whereas Harsanyi’s utilitarian conclusions require cardinal utility...

We study a two period representative agent economy in which economic liberalization is modeled as adding a positive random variable to the marginal product of capital. We show liberalization always raises the expected utility of agents. Agents may respond to this by increasing consumption in the ̄rst period. Consequently, consumption in the second period is sometimes smaller than the in the ̄rs...

Based on a cognitive notion of neo-additive capacities reflecting likelihood insensitivity with respect to survival chances, we construct a Choquet Bayesian learning model over the life-cycle that generates a motivational notion of neoadditive survival beliefs expressing ambiguity attitudes. We embed these neoadditive survival beliefs as decision weights in a Choquet expected utility life-cycle...