On power distribution in weighted voting

We study here the strategic possibilities in a voting system where, in weight terms, there is a single main agent and the others are equivalent. As an alternative to the coalition formation, we suggest for the minor agents a more discreet, anonymous and solidary behavior based on commitments referred to the size of the coalitions that they would agree to form. In order to analyze, in a coherent way, the effects of such commitments on the a priori power distribution, we use as measures of power the Shapley value and a certain class of semivalues closely related to it.Research partially supported by Grant BFM 2003–01314 of the Science and Technology Spanish Ministry. The authors wish to thank Professor Maurice Salles and two anonymous referees for their stimulating comments.     

Out-of-sample forecast errors in misspecific perturbed long memory processes

In this paper we examine the relative increase in mean square forecast error fro fitting a weakly stationary process to the series of interest when in fact the true model is a so-called perturbed long-memory process recently introduced by Granger and Marmol (1997). This model has the property of being unidentifiable from a white noise process on the basis of the correlogram and the usual rule-of-thumbs in the Box-Jenkins methodology. We prove that this kind of missspecification can lead to serious errors in terms of forecasting. We also show that corrections based on the AR(1) model can in some cases partially solve the problem. Received: March 15, 1999; revised version: February 14, 2000     

The Rationality of Under‐employing the Best‐performing Soccer Players

Abstract. This paper analyses the influence of sport performance (productivity) and other variables measuring the economic contribution of soccer players, upon the coach's decision of selecting a particular player. Using as dependent variable the proportion of time that individuals play in the Spanish professional soccer league, the paper concludes that players' economic market value does significantly affect the coach's choice, revealing the existence of other aims different from maximizing sport performance. We also examine the type of discrimination associated with lower chances of playing, which leads to smaller earnings and poorer career opportunities. The empirical evidence does not support discrimination due to nationality.     

Pretending emotions in the early years: The role of language and symbolic play

Although 3-year-old children sometimes simulate emotions to adapt to social norms, we do not know if even younger children can pretend emotions in playful contexts. The present study investigated (1) what emotions infants of 1–2 years old are capable of pretending and (2) the possible role of language and symbolic play in the ability to pretend emotions. The sample included 69 infants aged 18 to 31 months and their parents. Infants were administrated the Test of Pretend Play, and their parents responded to the MacArthur-Bates CDI-II inventory, part of the MacArthur-Bates CDI-I, and a questionnaire about the expression of pretend emotions. Results suggest that very young children simulate emotions. Furthermore, children's simulation of emotions was related to both symbolic play and language. Specifically, the ability to label emotions was linked to the ability to simulate them. The role of language and symbolic play in the development of the capacity to express and understand pretend emotions is discussed.     

Policy Shift: South Africa’s Old Age Pensions’ Influence on Perceived Quality of Life

Noncontributory pensions serve as an important resource for poverty-affected households in low- and middle-income countries. This study explores how a recent policy change to pension receipt influences perceived quality of life among older South Africans. We use survey data from the longitudinal World Health Organization Study on global AGEing and adult health and from the Agincourt Health and Socio-Demographic Surveillance System census. We find pension receipt to have a positive impact on both men’s and women’s perceived quality of life. These findings hold when controlling for prior well-being status. We find a significant moderating factor of physical limitations on the relationship between pension receipt and quality of life. Individuals reporting the highest levels of physical limitation report a larger increase in their quality of life upon pension receipt than those with less severe physical limitations. We conclude that despite the well-documented household income-pooling in this population, pension receipt still leads to a significant positive impact on pensioners’ perceived quality of life.     

The Effects of Deferred Action for Childhood Arrivals on the Educational Outcomes of Undocumented Students

Deferred Action for Childhood Arrivals (DACA) is the first large-scale immigration policy to affect undocumented immigrants in the United States in decades and offers eligible undocumented youth temporary relief from deportation as well as renewable work permits. Although DACA has improved the economic conditions and mental health of undocumented immigrants, we do not know how DACA improves the social mobility of undocumented immigrants through its effect on educational attainment. We use administrative data on students attending a large public university to estimate the effect of DACA on undocumented students’ educational outcomes. The data are unique because they accurately identify students’ legal status, account for individual heterogeneity, and allow separate analysis of students attending community colleges versus four-year colleges. Results from difference-in-difference estimates demonstrate that as a temporary work permit program, DACA incentivizes work over educational investments but that the effect of DACA on educational investments depends on how easily colleges accommodate working students. At four-year colleges, DACA induces undocumented students to make binary choices between attending school full-time and dropping out of school to work. At community colleges, undocumented students have the flexibility to reduce course work to accommodate increased work hours. Overall, the results suggest that the precarious and temporary nature of DACA creates barriers to educational investments.