Trip packing in petrol stations replenishment

This paper considers a generalized version of the trip packing problem that we encountered as a sub-problem of the petrol stations replenishment problem. In this version we have to assign a number of trips to a fleet composed of a limited number of non-identical tank-trucks. Each trip has a specific duration, working time of vehicles is limited and the net revenue of each trip depends on the truck used. The paper provides a mathematical formulation of the problem and proposes some construction, improvement and neighbourhood search solution heuristics. A set of benchmark problem instances is created in a way that reflects real-life situations and used to analyse the performance of the proposed heuristics. A real-life case is also used to further assess the proposed heuristics.     

Migration as a source of growth: The perspective of a developing country

This paper analyses the dynamics of migratory flows and growth in a developing economy. We show that when workers freely choose their location, some natives can rationally decide to return to their home country after they have accumulated a certain amount of knowledge abroad, while some prefer to stay permanently in the same economy (either at home or abroad). We point out that worker mobility can have an expansionary effect on the developing economy. Moreover, we show that in the long-run, as the sending economy develops, fewer natives are likely to emigrate and more migrants are likely to return. Received: 7 December 2000/Accepted: 25 April 2001     

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.     

Deprivation using satisfaction measures in Spain: An evaluation of unemployment benefits

The evaluation of social programs constitutes an important aspect in the modeling of economic policies. On the basis that the measurement of well being through subjective measures provides a broader perspective than through objective economic variables, this paper first identifies the determinants of deprivation in Spain, in monetary terms, and in non-monetary terms using satisfaction variables. In addition to establishing that the more unequal the income distribution within a group, the less income-satisfied is the individual, we find that unemployment is one of the main determinants of deprivation and satisfaction. Accordingly, we propose a reform of unemployment benefit policy that maintains individuals at the same utility level as when employed, rather than applying the current benefit system. Our policy conclusions reveal that the public budget dedicated to paying benefits to restore satisfaction levels, during the period 1994-1999, would have increased by €2,536,165.13 thousand on an average annually. It could be a desirable policy in good times but, since it increases public spending and thus public deficit, economic policy makers should decide whether it is adequate in rainy days.     

Revealing the elusive effects of vividness: a meta-analysis of empirical evidences assessing the effect of vividness on persuasion

Despites decades of research, past studies focusing on the effects of vividness on persuasion found mixed and contradictory results. In order to solve this conflicting issue, a meta-analysis was conducted on empirical studies assessing the impact of vivid (vs. pallid) communications on attitude and/or behavioral intention. Overall, 27 articles (k = 43; N = 7575) were included. Our results showed that vividness yielded significant small-to-medium effect on both attitude (d₊ = .31) and behavioral intention (d₊ = .39). Furthermore, meta-regression analyses indicated that memory recall, cognitive elaboration, and topic valence moderated these effects, whereas vividness/argument congruency was not significantly related to the variations of effects sizes. Finally, theoretical implications of theses finding will be discussed.     

Incremental exercise tests in master athletes and untrained older adults

This study aimed to analyze the impact of step-duration protocols, 1-min vs. 3-min, on cardiorespiratory responses to exercise, whatever the aerobic-fitness level of sedentary (65.5 +/- 2.3 years, n = 8) or highly fit (63.1 +/- 3.2 years, n = 19) participants. Heart rate and VO2 at the first and second ventilatory thresholds (VT1 ,VT2) and maximal exercise were not significantly different between the two protocols. In master athletes, the 3-min protocol elicited significantly lower ventilation at VT2 and maximal exercise (p < .01). In the latter, breathlessness was also lower at maximal exercise (p < .05) than in sedentary participants. In trained or sedentary older adults, VT1, VT2, and were not influenced by stage duration. According to the lower breathlessness and ventilation, however, the 3-min step protocol could be more appropriate in master athletes. In untrained participants, because the cardiorespiratory responses were similar with the two incremental exercise tests, either of them could be used.     

Wage Bargaining with On‐the‐Job Search: Theory and Evidence

Most applications of Nash bargaining over wages ignore between‐employer competition for labor services and attribute all of the workers' rent to their bargaining power. In this paper, we write and estimate an equilibrium model with strategic wage bargaining and on‐the‐job search and use it to take another look at the determinants of wages in France. There are three essential determinants of wages in our model: productivity, competition between employers resulting from on‐the‐job search, and the workers' bargaining power. We find that between‐firm competition matters a lot in the determination of wages, because it is quantitatively more important than wage bargaining à la Nash in raising wages above the workers' “reservation wages,” defined as out‐of‐work income. In particular, we detect no significant bargaining power for intermediate‐ and low‐skilled workers, and a modestly positive bargaining power for high‐skilled workers.