La Funcion del Bostezo en la Comunicacion Social de un Grupo de Babuinos

Resumen

La adecuación entre el perfil que ofrecen las mujeres altamente cualificadas que quieren acceder a puestos de dirección y la demanda de las organizaciones de un comportamiento directivo, horizontal y centrado en las personas, alternativo al que impera en la actual cultura empresarial, es el punto de partida del presente estudio. Diversas teorías asocian el estilo directivo transformacional con características prototípicamente femeninas. Este trabajo se plantea dos propósitos. Por un lado, comprobar en una amplia muestra representativa de hombres y mujeres que desempeñan puestos de dirección si existen diferencias en su estilo directivo; y por otro lado, si es así, analizar su correspondencia con los estilos transaccionaly transformational a partir del cuestionario de liderazgo de Bass y Avolio. La interpretación de los resultados demuestra la necesidad de fomentar la incorporación de las mujeres a cargos de dirección, no únicamente por razones humanitarias basadas en la igualdad de derechos y oportunidades, sino por la contribución del estilo directivo femenino a la eficacia organizational.     

Likelihood ratio ordering of order statistics,mixtures and systems

Let X=(_X1,_X2,…,_Xn)$\mathit{X}=(X_1,X_2,\dots ,X_n)$ be an exchangeable random vector, and denote _X1:i=min{_X1,_X2,…,_Xi}$X_{1:i}=\min \{X_1,X_2,\dots ,X_i\}$ and _Xi:i=max{_X1,_X2,…,_Xi}$X_{i:i}=\max \{X_1,X_2,\dots ,X_i\}$, 1?i?n$1?i?n$. These order statistics represent the lifetimes of the series and the parallel systems, respectively, with component lifetimes _Xi$X_i$. In this paper we obtain conditions under which _X1:i$X_{1:i}$ (or _Xi:i$X_{i:i}$) decreases (increases) in i in the likelihood ratio (lr) order. An even more general result involving general (that is, not necessary exchangeable) random vectors is also derived for general series (or parallel) systems. We show that the series (parallel) systems are not necessarily lr-ordered even if the components are independent.     

On the use of functional calculus for phase-type and related distributions

The area of phase-type distributions is renowned for its ability to obtain closed form formulas or algorithmically exact solutions to many complex stochastic models. The method of functional calculus will provide an additional tool along these lines for establishing results in terms of functions of matrices. Functional calculus, which is a branch of operator theory frequently associated with complex analysis, can be applied to phase-type and matrix-exponential distributions in a rather straightforward way. In this article we provide a number of examples of how to execute the formal arguments.     

DISTRIBUTIONAL CHARACTERIZATIONS THROUGH SCALING RELATIONS

Investigated here are aspects of the relation between the laws of X and Y where X is represented as a randomly scaled version of Y. In the case that the scaling has a beta law, the law of Y is expressed in terms of the law of X. Common continuous distributions are characterized using this beta scaling law, and choosing the distribution function of Y as a weighted version of the distribution function of X, where the weight is a power function. It is shown, without any restriction on the law of the scaling, but using a one‐parameter family of weights which includes the power weights, that characterizations can be expressed in terms of known results for the power weights. Characterizations in the case where the distribution function of Y is a positive power of the distribution function of X are examined in two special cases. Finally, conditions are given for existence of inverses of the length‐bias and stationary‐excess operators.     

The Features of Development in the Pacific Countries of the African,Caribbean and Pacific Group

In this article we present a new proposal for the measurement of development, applied to the Pacific Countries of the African, Caribbean and Pacific Group (ACP), conditional on their insularity, and with privileged relations with the European Union. Our index has been constructed attending to the criteria defined in the Goals of the Millennium Declaration. For this purpose we will use the P₂ distance method for the year 2007, the last year for which data are available. This index integrates socio-economic variables that permit a territorial ordering of the Pacific ACPs, in terms of those partial indicators.     

Properties of systems with two exchangeable Pareto components

The life lengths of the units in a system can be modelled by a bivariate distribution. In this paper, we suppose that the joint distribution of the units is a symmetric bivariate Pareto (Lomax) distribution. For this model, we obtain basic reliability properties for series and parallel systems. J. M. Ruiz Partially Supported by Ministerio de Ciencia y Tecnologia under grant BFM2003-02947 and Fundacion Seneca under grant 00698/PI/04.     

Constructing a Teacher of Qualitative Methods: A Reflection

This paper reflects on and theorizes strategies to design and teach an introductory qualitative research class to US doctoral students. My orientation towards learning theory as an educational psychologist shapes my analysis in fundamental ways. The course blends elements of philosophy, method, skill‐building and reflection to explore both ‘why’ and ‘how to’ elements of qualitative research. Four process components are examined: (1) the construction of my own beliefs about research, (2) the evolution of course readings and skill‐building activities, (3) an analysis of quotations from students’ work, and (4) implications for teaching research methods courses. Class members unearthed moral and ethical dilemmas in every aspect of the research process, and we worked to excavate ways to do quality work in respectful ways. My reflection concludes with two personal insights: (1) social science graduate students in the US need more opportunities to think theoretically and write interpretively and (2) self‐knowledge is integrally connected to issues of openness, voice, and seeing the world with new eyes through the research process.     

Neuropsychological Profiles of Victims of Financial Elder Exploitation at the Los Angeles County Elder Abuse Forensic Center

The current article examines neuropsychological correlates of financial elder exploitation in a sample of older adults who have been documented victims of financial elder exploitation. The purpose of this exploratory study was twofold. First, a subsample of the referrals at the Los Angeles County Elder Abuse Forensic Center (LACEAFC) was compared to community dwelling adults in terms of the specific cognitive domains linked to financial capacity including memory, calculation, and executive functioning. Next, the correlation between presence of neuropsychological data and the likelihood of filing a case with the LA County’s District Attorney office was examined. Twenty-seven LACEAFC cases and 32 controls were assessed. Overall, the forensic center group performed worse than a community-based age-matched control group on the MMSE, calculation, and executive functioning (ps < .01). The presence of neuropsychological data was significantly correlated to an increased likelihood of a case being filed.     

Impact of Gender and the Stereotyped Nature of Illustrations on Choice of Color: Replica of the Study by Karniol (2011) in a Spanish Sample

Early acquisition of stereotypes that associate “blue” with boys and “pink” with girls can influence their preferences for these colors and also their choices in clothing, toys or objects in relation to gender stereotypes. In a Spanish sample (5–10-year olds, n = 614), this study reproduces the previous research conducted by Karniol (Sex Roles 65(1/2):119–132, 2011) for the purpose of analyzing whether gender-linked color preferences rule the choice of coloring booklets and if children’s choices of color are affected by their own gender. The results show that although boys used fewer female-stereotyped colors than girls, both genders colored in each figure with the stereotyped colors associated with them. This result indicates that boys and girls share similar gender stereotypes and use colors that agree with these stereotypes.