Discounted Stochastic Games With No Stationary Nash Equilibrium: Two Examples

We present two examples of discounted stochastic games, each with a continuum of states, finitely many players, and actions, that possess no stationary equilibria. The first example has deterministic transitions—an assumption undertaken in most of the early applications of dynamics games in economics—and perfect information, and does not possess even stationary approximate equilibria or Markovian equilibria. The second example satisfies, in addition to stronger regularity assumptions, that all transitions are absolutely continuous with respect to a fixed measure—an assumption that has been widely used in more recent economic applications. This assumption has been undertaken in several positive results on the existence of stationary equilibria in special cases, and in particular, guarantees the existence of stationary approximate equilibria.     

Estimation and tests of hypotheses for the initial mean and covariance in the kalman filter model

Kalman filtering techniques are widely used by engineers to recursively estimate random signal parameters which are essentially coefficients in a large-scale time series regression model. These Bayesian estimators depend on the values assumed for the mean and covariance parameters associated with the initial state of the random signal. This paper considers a likelihood approach to estimation and tests of hypotheses involving the critical initial means and covariances. A computationally simple convergent iterative algorithm is used to generate estimators which depend only on standard Kalman filter outputs at each successive stage. Conditions are given under which the maximum likelihood estimators are consistent and asymptotically normal. The procedure is illustrated using a typical large-scale data set involving 10-dimensional signal vectors.     

Computer experiments: a review

In this paper we provide a broad introduction to the topic of computer experiments. We begin by briefly presenting a number of applications with different types of output or different goals. We then review modelling strategies, including the popular Gaussian process approach, as well as variations and modifications. Other strategies that are reviewed are based on polynomial regression, non-parametric regression and smoothing spline ANOVA. The issue of multi-level models, which combine simulators of different resolution in the same experiment, is also addressed. Special attention is given to modelling techniques that are suitable for functional data. To conclude the modelling section, we discuss calibration, validation and verification. We then review design strategies including Latin hypercube designs and space-filling designs and their adaptation to computer experiments. We comment on a number of special issues, such as designs for multi-level simulators, nested factors and determination of experiment size.     

Status,National Culture and Customers’ Propensity to Complain

People’s ability to express their voice in different situation is an important facet of their quality of life. This study examines the relationship between social status, cultural characteristics and customers’ voice behavior in multiple cultures. We hypothesized that social status would be positively related to customers’ voice expression. The cultural dimensions of power distance and uncertainty avoidance were expected to affect that behavior and to moderate the status–voicing relationship. Analysis of data concerning 8,479 customers from 12 countries showed that, as expected, customers with high status tended to register more service failures and to complain more frequently than customers of lower social status. All three social status distinctions explored in this study (gender, education, and age) correlated negatively with formal complaint, but only age correlated negatively with informal complaint. In addition, the two cultural dimensions had the expected negative effect on intention to complain, and moderated the relationship between social status and intention to complain. Theoretical contributions and applied implications are discussed.     

Attachment‐Based Family Therapy With a 13‐Year‐Old Girl Presenting With High Risk for Suicide

This article describes the application of Attachment‐Based Family Therapy (ABFT) to the treatment of a 13‐year‐old female adolescent presenting with high risk of suicide, complicated by a history of depression and sexual trauma. The article begins with an overview of ABFT, including (a) how attachment theory guides treatment; (b) the structure of the clinical model; and (c) the data that provide empirical support. A case example is then presented that exemplifies the primary clinical procedures used to reach therapeutic goals in ABFT, including attachment repair and autonomy/competence promotion. Weekly changes in suicide ideation and depression scores are presented. The article concludes with a discussion about implications for family‐based treatment of suicidal youth.     

Psychopathology and pathological gambling among males: Theoretical and clinical concerns

In this paper, some possible relationships between psychopathology and pathological gambling are delineated. The assessment and stabilization of such patients, including psychotherapeutic and pharmacologic strategies, are discussed. Guidelines for treating patients manifesting both a psychiatric illness and a gambling problem are suggested.     

The effects of driving age, driver education, and curfew laws on traffic fatalities of 15-17 year olds

This study examines the effect of state driving age, learning permit, driver's education, and curfew laws on 15-17-year-old driver fatality rates. A multivariate regression model is estimated for 47 states and nine years. The minimum legal driving age and curfew laws are found to be important determinants of fatalities. Driver's education and learning permits have smaller effects. The relationship between rates of licensure and driving age, education, and curfew laws is also examined. In each case, a more restrictive policy is found to reduce licensure of 15-17 year olds. The results suggest that the imposition of curfew laws and higher minimum driving ages are particularly effective traffic safety policies.     

SOCIAL STRUCTURE AND GENERATIONS IN ART:

This study examines artistic innovations from the point of view of age structure and age stratification. Drawing on Mannheim's theory of generations, it describes and analyzes the history of the Hebrew theater, from its beginnings in 1917 to 1977, in terms of four theaters that were expressions of generation units. The study suggests that the crucial variable in explaining changes in artistic ideologies, contents, and styles of the Hebrew theater is Mannheim's concept of generation unit. The emergence and evolution of these generational theaters are explained in relation to changes in the demographic, political, and social structures of Israeli society during the historical era under consideration. Special emphasis is placed on the role of youth in originating artistic innovations and on the problems of maintaining and institutionalizing innovations.     

Life satisfaction—Aspirations and alcohol use: A preliminary report

Significant differences have been found to exist among individuals with different drinking patterns with respect to past life satisfactions — five years ago (p < 0.001) and present satisfaction (p < 0.005); however, no significant difference in future aspirations could be identified. In addition, using an ‘unrealistic hopefulness’ coefficient, the authors found higher future aspirations levels than would be normally expected. Those individuals who drink more now than five years ago consistently show the lowest mean satisfaction scores on the Cantril Self-Anchoring Striving Scale. Those whose drinking pattern remained stable over time consistently perceived themselves highest on the scale both five years ago and now, regardless of present drinking pattern. At the time this article was written Drs Levy and Bell and Ms Lin were with the University of Louisville, Department of Psychiatry & Behavioral Sciences. Dr Levy is now with the Sepulveda VA Hospital, LA, California. Reprints may be obtained through Dr Levy.