Procedure to identify outliers through cumulative distribution of extremes in a Gamma response model

This work aimed at proposing a procedure based on the cumulative distribution of maximums and minimums to identify outliers in generalized Gamma-response models. In order to validate such method, we used simulations scenarios defined by the combination of different samples, contamination rate and distributions with different degrees of asymmetry. In this context, probabilities related to errors in classification and accuracy were obtained by carrying by Monte Carlo simulations. Using cumulative distribution of extremes to identify outliers in a Gamma-response model is recommended, since it is not likely to present errors and was highly accurate in all assessed scenarios.     

THE EFFECT OF EMPLOYMENT PROTECTION ON WORKER EFFORT: ABSENTEEISM DURING AND AFTER PROBATION

Employment protection systems are widely believed to generate distortions in firms' hiring and firing decisions. However, much less is known about the impact of these regulations on workers' behavior. In this paper we provide evidence on the latter question using data from a large Italian bank. Our analysis is based on weekly observations for 545 men and 313 females hired as white‐collar workers between January 1993 and February 1995. These workers begin to be protected against firing only after the 12th week of tenure, and we observe them for one year. We show that—particularly for men—the number of days of absence per week increases significantly once employment protection is granted at the end of probation. This suggests that the provision of employment protection causes the increase in absenteeism. Alternative explanations based on career concerns or on learning about social norms would predict a smooth relationship between absenteeism and tenure instead of the observed discrete jump. This consequence of employment protection seems to have been neglected in European policy debates so far. (JEL: J2, D2, D8, M5)     

Ergonomics in designing process: dialogue between designers, executors and users in the maintenance activity of radars in an oil refinery

This paper aims to discuss the role of ergonomics in design process using the dialogue developed by designers, implementers and users in an oil refinery. It was possible to identify the need of minimizing the postural constraints, risk of accidents, mechanical shocks and to enlarge safety perception in the access and permanency of the users at the workspace. It has been determined and validated by workers and managers to implement different deadlines depending on programming, viability and execution time for the improvements proposed. In a long-term: it was proposed the substitution of the ladders with time planning according to the maintenance program of the tanks; in a short-time: it was suggested the expansion of the existing platforms, implementation of a walkway connection provided with guardrails between the upper access of the side ladder and the repositioning of radar set and aerial aiming at the usage by workers at the workstation of the new platform. It was also elaborated eight typologies of intervention, according to the request, type of tank, material stored, and its setting place. The design process arises from ergonomics workplace analysis that presents concepts for solutions which was a mediator tool to be settled between users and implementers.     

Change in the Association Between Premarital Cohabitation and Separation,Australia 1945 – 2000

We investigate change in the association between premarital cohabitation and the risk of separation. Using retrospective marriage history data from the first wave (2001) of the Household Income and Labor Dynamics in Australian survey, we examine 6,210 first marriages formed between 1945 and 2000. We find the association between premarital cohabitation and separation is changing. The increased risk of separation for cohabitors compared to noncohabitors diminishes each year for marriages before 1988. This association then reverses for marriages after 1988, where noncohabitors have an increased risk of separation. Our results indicate that, for more recent marriages, premarital cohabitation reduces the risk of separation; more research is needed to understand the underlying mechanisms for this reversal.     

Personalization,gender, and social media: gubernatorial candidates’ social media strategies

This study focuses on the ‘self-personalization’ of campaign politics, marked by candidates highlighting their personal lives over their policy positions. The rise of social media may be accelerating this shift. Applying Strategic Stereotype Theory [Fridkin, K. L., &; Kenney, P. J. (2014 Fridkin, K. L., &; Kenney, P. J. (2014). The changing face of representation: The gender of U.S. senators and constituent communications. Ann Arbor: University of Michigan Press.[Crossref] , [Google Scholar]). The changing face of representation: The gender of U.S. senators and constituent communications. Ann Arbor: University of Michigan Press.], which holds that women politicians try to deactivate stereotypes that associate men with agentic leadership traits while capitalizing on stereotypes that associate them with warmth, we assess what role gender plays in candidate self-personalization on social media. A large-scale computerized content analysis of social media posts by gubernatorial candidates in 2014 suggests that male candidates may see more and female candidates see less strategic benefits in personalizing, but this effect does not persist in the face of electoral contextual variables like competitiveness. We also find qualitative differences in the ways male versus female candidates personalize through social media.     

Where o’ where did my baseball cards go?: Race,performance, and placement in the Topps ERA, 1956–1980

On the surface, baseball cards appear to be little more than uninteresting object of child's play; yet they provide invaluable data for assessing unique aspects of the social order. They reveal much about the state of society when they were produced and the people who collected them. This paper examines the unique numbering system the Topps company developed to differentiate among the “royalty of the diamond” from 1956 to 1980. Their system assigned to each card in a set a number that explicitly designated its placement, while implicitly establishing a hierarchical ordering among the players, ostensibly based on performance. It is arguable whether the numbering system Topps developed was based on performance or the ascribed characteristic of race. The results of our work suggest that player performance, not race, was the primary factor in the assignment of “prestigious” card numbers in Topps’ system.