A game theory modeling approach for 3G operators

This paper presents the technoeconomic evaluation of a third generation rollout scenario followed by the identification of the market conditions for two operators in a simple game theory model. The considered scenarios reflect the point of view of both dominant operators and new entrants. Technoeconomic results are presented in terms of net present value (NPV), acting like the pay-off function in the proposed theoretical Game Theory model. The business case presented here was studied by using a tool, developed by European Projects IST-25172 TONIC/ ECOSYS, a model developed by the EURESCOM P901 project and the Game Theory Tool named Gambit. © Springer Science+Business Media, LLC. 2008

Substance-related and behavioural addiction problems: Two surveys of Canadian adults

Pre-print version of article deposited according to Informa Healthcare's Resources for Editors and Authors page: http://informahealthcare.com/page/resources/authorsObjectives: To describe absolute and relative prevalence of 10 self-attributed substance-related and behavioural addiction problems among Canadian adults, to describe perceived prevalence of these problems in the general population, and to examine whether estimates varied by survey mode. Methods: Sample 1 included 4000 adults recruited from an online research panel; Sample 2 included 2000 randomly selected adults who completed a computer-assisted telephone interview. Respondents in both samples were asked (1) whether or not they had experienced a problem in the preceding year with each of four substances (alcohol, tobacco, marijuana, and cocaine) and six behaviours (gambling, eating, shopping, sex, video gaming, and work), (2) whether they had ever personally knew someone exhibiting a problem with each behaviour, and (3) perceived prevalence of problems in the general population. Results: About half of the respondents reported experiencing any past-year addiction problems. Tobacco and alcohol were the most common substance-related problems, while the most common behavioural problems were related to eating and work. Respondents consistently overestimated perceived population prevalence relative to self-attributed problems; however, the magnitude of overestimation was significantly greater among those who personally reported a problem with these behaviours. Online survey participants consistently reported higher self-attributed problem rates compared with CATI respondents, but rank-order correlations across self-, acquaintances-, and population-attributed prevalence estimates were very high in both samples. Conclusions: Both survey modes provided accurate relative prevalence estimates, but further research should explore determinants of higher prevalence rates among online participants and respondents’ consistent tendency to overestimate perceived population prevalence.Ye