Search results for "OUTCOME"
showing 10 items of 5148 documents
Droghe leggere e criminalità organizzata: una relazione problematica
2022
Il contributo analizza il tema dei rapporti tra trattamento penale delle droghe c.d. “leggere” e contrasto alla criminalità organizzata dedita al narcotraffico, con riguardo all’ordinamento europeo, internazionale e di alcuni Paesi dell’UE (Spagna, Portogallo, Grecia, Germania e Italia). Seguendo un approccio di tipo integrato, all’analisi del dato normativo si affianca la descrizione della fenomenologia dei traffici e la valutazione dei primi effetti che le riforme antiproibizioniste entrate in vigore in alcuni ordinamenti del Nord e del Sud America hanno prodotto sul fronte del mercato illecito. Il fine è di evidenziare i punti di forza e di debolezza dei modelli di depenalizzazione, tene…
Consensus in inventory games
2008
This paper studies design, convergence, stability and optimality of a distributed consensus protocol for n-player repeated non cooperative games under incomplete information. Information available to each player concerning the other players' strategies evolves in time. At each stage (time period), the players select myopically their best binary strategy on the basis of a payoff, defined on a single stage, monotonically decreasing with the number of active players. The game is specialized to an inventory application, where fixed costs are shared among all retailers, interested in reordering or not from a common warehouse. As information evolves in time, the number of active players changes t…
Noncooperative dynamic games for inventory applications: A consensus approach
2008
We focus on a finite horizon noncooperative dynamic game where the stage cost of a single player associated to a decision is a monotonically nonincreasing function of the total number of players making the same decision. For the single-stage version of the game, we characterize Nash equilibria and derive a consensus protocol that makes the players converge to the unique Pareto optimal Nash equilibrium. Such an equilibrium guarantees the interests of the players and is also social optimal in the set of Nash equilibria. For the multi-stage version of the game, we present an algorithm that converges to Nash equilibria, unfortunately not necessarily Pareto optimal. The algorithm returns a seque…
Bounded Computational Capacity Equilibrium
2010
We study repeated games played by players with bounded computational power, where, in contrast to Abreu and Rubisntein (1988), the memory is costly. We prove a folk theorem: the limit set of equilibrium payoffs in mixed strategies, as the cost of memory goes to 0, includes the set of feasible and individually rational payoffs. This result stands in sharp contrast to Abreu and Rubisntein (1988), who proved that when memory is free, the set of equilibrium payoffs in repeated games played by players with bounded computational power is a strict subset of the set of feasible and individually rational payoffs. Our result emphasizes the role of memory cost and of mixing when players have bounded c…
Are Low Prices Compromises Collusion Guarantees? An Experimental Analysis of Price Matching Policies
2001
In this paper we experimentally test the ability of Price-Matching Guarantees (PMG) to rise prices above the competitive level. We implement three different treatments of symmetric duopolies to check the effect of PMG both as a market institution and as a business strategy. In the absence of any low-price guarantee, prices get close to the Bertrand-Nash equilibrium although in the 50 rounds of the experiment no full convergence is obtained. The existence of PMG as an institution in a market where firms decide only about prices results in a clear collusive outcome as all markets quickly and fully converge to the collusive prediction. If we allow subjects to decide whether they adopt price ma…
Mean Field Linear Quadratic Games with Set Up Costs
2013
This paper studies linear quadratic games with set up costs monotonic on the number of active players, namely, players whose action is non-null. Such games arise naturally in joint replenishment inventory systems. Building upon a preliminary analysis of the properties of the best response strategies and Nash equilibria for the given game, the main contribution is the study of the same game under large population. We also analyze the influence of an additional disturbance in the spirit of the literature on H∞ control. Numerical illustrations are provided. © 2012 Springer Science+Business Media New York.
The alliance-outcome association in group interventions: A multilevel meta-analysis.
2022
Objective: The therapeutic alliance has been studied in group interventions, but its relationship to patient outcome is still controversial. This study systematically reviewed the association of both the member-leader and member-group alliance with patient outcomes, and assessed the effects of several theoretically informed moderators. Method: A three-level meta-analysis was conducted on 57 studies to disentangle within- and between-study variability in the alliance-outcome association. Results: The overall effect size of the unconditional model was r = -.259 (95% CI: -.302, -.214; p < .001), whereas the correlation between alliance and outcome based on the three-level meta-analytic mode…
Current Issues on Group Psychotherapy Research: An Overview
2014
Recent efforts to improve group psychotherapy have focused on codifying both evidence-based treatments and therapeutic relationships. This chapter reviews the numerous advances in empirical research on group psychotherapy and highlights therapeutic practices ensuing from the evidence. The authors synthesize some of the most crucial development in group psychotherapy research, such as the effectiveness of group treatments, the mechanisms of change of group therapies, the components of group relationship, and issues regarding methodological problems associated with the analysis of group data.
Going beyond: Users’ experiences of helping professionals
2014
Background: Establishing a working alliance has been found to be of great importance for the outcome of professional interventions for people diagnosed with severe mental illnesses. Aim: The aim of ...
Cognitive behavior therapy for functional gastrointestinal disorders: is group treatment effective?
2003
Objective:The intention of this study was to evaluate therapy outcome of a cognitive-behavioral group treatment program for functional gastrointestinal disorders. As a particular characteristic, gastrointestinal symptoms were investigated independently from diagnostic categories on a dimensional basis, considering the persistence of symptoms as well as the aspect of severity.Methods:A total of 64 subjects participated in the 10-week treatment program, and 49 completed the study. Subjects underwent four assessments (baseline, pre-, post-treatment, 12-month follow-up), each comprising several self-rated questionnaires on gastrointestinal, somatoform, depressive, hypochondriacal and anxious sy…