Comparing mining and manufacturing supply chain processes: challenges and requirements

The mineral raw materials industry is essential for manufacturing by providing the basic materials for their value adding processes. In the last decade, the integration of operations of the industry within global manufacturing supply chains has progressed greatly. The processes of the different stakeholders have been extensively analysed and modelled according to standardised frameworks such as the supply chain operations reference (SCOR) model. However, as of today, not all stakeholders are integrated to the same extent. Especially, in the early part of the supply chain, deep integration of the mineral raw materials industry is still an exception. This industry and its processes differ greatly from the average manufacturing company’s processes. Not being directly comparable results in the absence of applications of standardised modelling tools for supply chains like the above-mentioned SCOR model. These circumstances hinder the integration, understanding and exchange between industries that rely significantly on each other. In a first attempt to create a basis for further research, this study analyses, elaborates and compares the challenges and requirements of supply chain processes, with a special focus on sourcing processes, in manufacturing and mining. Based on these findings, an adaption of the SCOR model towards applicability in mining and mining supply processes is presented, followed by a critical discussion of the results and implications, later concluded by a short outlook on further research.     

Cross-lagged relationships between workplace bullying,job satisfaction and engagement: Two longitudinal studies

Abstract

Workplace bullying has been defined as a stressor that has negative consequences. However, the direction of the bullying–well-being relationship has been largely based on cross-sectional findings, which does not permit conclusions in terms of causality. The purpose of this research was to investigate the cross-lagged relationships between bullying and job-related well-being. We hypothesized that Time 1 bullying predicted Time 2 job-related well-being over time (normal causation model). In addition, we compared alternative models (baseline or stability, reversed, and reciprocal models). Our hypothesis was examined in two longitudinal studies with full two-wave panel designs in Belgian employees. In Study 1 (N=312), the time lag was six months, and in Study 2 (N=369), the time lag was two years. Results of structural equation modelling (SEM) analyses partially supported our hypothesis. Specifically, it was found that Time 1 bullying predicted Time 2 dedication in Study 1, and Time 2 job satisfaction in Study 2. There was no significant cross-lagged effect of job-related well-being on bullying at work. Overall, these findings suggest that bullying can be considered as a cause, rather than aconsequence of job-related well-being.     

Condorcet choice functions and maximal elements

Choice functions on tournaments always select the maximal element (Condorcet winner), provided they exist, but this property does not hold in the more general case of weak tournaments. In this paper we analyze the relationship between the usual choice functions and the set of maximal elements in weak tournaments. We introduce choice functions selecting maximal elements, whenever they exist. Moreover, we compare these choice functions with those that already exist in the literature.Thanks are due to José Alcalde, J.V. Llinares and M.C. Sánchez, for helpful comments. The comments and suggestions of a referee’s report have improved the work; we are most grateful to her/him. Financial support from the Spanish DGICYT, under project BEC2001-0781, Fundación Séneca (PI74/00826/FS/01) and from the IVIE is acknowledged.     

Bayesian longitudinal models for paediatric kidney transplant recipients

Chronic kidney disease is a progressive loss of renal function which results in the inability of the kidneys to properly filter waste from the blood. Renal function is usually estimated by the glomerular filtration rate (eGFR), which decreases with the worsening of the disease. Bayesian longitudinal models with covariates, random effects, serial correlation and measurement error are discussed to analyse the progression of eGFR in first transplanted children taken from a study in València, Spain.     

Parental religiosity and daughters’ fertility: the case of Catholics in southern Europe

Preferences, including preferences for children, are shaped during the formative years of childhood. It is therefore essential to include exposure to religious practice during childhood in an attempt to establish a link between religiosity and fertility. This path has not been explored in the documented literature that looks at the relationship between current religiosity and fertility. The International Social Survey Programme: Religion II (ISSP) provides the data base. It includes information on maternal/paternal/own mass participation when the respondent was a child (nine levels each), as well as on his current churchgoing (six levels) and prayer habits (eleven levels). These variables are included as explanatory variables in ‘fertility equations’ that explain the number of children of Catholic women in Spain and Italy. The core findings are that exposure to religiosity during the formative years of childhood, has a pronounced effect on women’s ‘taste for children’ that later on translates into the number of her offspring. In Spain, the two parents have major opposite effects on women. Most striking is the negative effect of the mother’s intensity of church attendance on her daughter’s fertility: Women who were raised by an intensively practicing mother have on average one child less that their counterparts who were raised by a less religious mother. On the other hand, an intensively practicing father encourages the daughter to have more children (by about 0.8, on average). The Italian sample confirms the statistically significant negative effect of the mother’s religiosity. The father’s religious conduct has apparently no effect on Italian women’s birth rates. Current religiosity seems to be irrelevant, both in Spain and in Italy. It follows that religiosity and fertility are interrelated but the mechanism is probably different from the simplistic causality that is suggested in the literature.

Results of a Quality of Work Life Index in Spain. A Comparison of Survey Results and Aggregate Social Indicators

The European Union launched the Lisbon Strategy in 2000 with the aim of establishing itself as the world’s most powerful economy. The importance of job quality has returned to the top of the European employment and social policy agenda. As targets are set, significant progress has been made in the creation of indicators. In this study, we compute a composite index for quality of work life using the dimensional structure provided by the European Commission, and present our results for regions, sectors, professional categories and sizes of firm in Spain in the period 2001–2004. We find that better results are found in the more developed regions, in service sectors, in bigger firms and in jobs with more responsibility. Finally, we compare the results of the index with workers’ subjective perceptions of job satisfaction, measured by a quality of work life survey. The test results reveal a strong relationship between the two measurements.     

Smoking Risks in Spain: Part III—Determinants of Smoking Behavior

Using original survey data from Spain, this paper assesses the determinants of smoking behavior. This study examines the effect on smoking of the most diverse set of risk measures ever considered: lung cancer, relative lung cancer risks, lung disease, heart disease, relative heart disease risks, lost life expectancy to smokers, and various risk measures for passive smoking. Smoking measures include cigarette smoking, the number of cigarettes smoked, and pipe and cigar smoking. Primary smoking risks have a more consistent negative effect on smoking than perceived passive smoking risks.     

Lay Conceptions of Well-Being and Rules Used in Well-Being Judgments Among Young,Middle-Aged,and Elderly Adults

The present study deals with lay conceptions of well-being and its main determinants, and the rules used by everyday people to assess the well-being of others based on various pieces of information. The results showed that (a) most proposed definitions of well-being refer to the family, the physical body, and acceptance of oneself and one's situation; (b) the factors with the greatest impact on judgments of the well-being of others are health, harmony with spouse, harmony with children, self-acceptance, positive relations, purpose in life, and personal growth; (c) the above findings apply to respondents of all ages; and (d) the information integration rule for estimating the level of the well-being is essentially additive.     

Reliability, Validity, and Classification Accuracy of a Spanish Translation of a Measure of DSM-IV Diagnostic Criteria for Pathological Gambling

The aim of this study was to measure the reliability, validity, and classification accuracy of a Spanish translation of a measure of DSM-IV diagnostic criteria for Pathological Gambling (PG). Participants were 263 male and 23 female patients seeking treatment for PG and a matched non-psychiatric control sample of 259 men and 24 women. A Spanish translation of a 19-item measure of DSM-IV diagnostic criteria for PG (Stinchfield 2003) was administered along with other validity measures. The DSM-IV diagnostic criteria were found to be internally consistent with a coefficient alpha of .95 in the combined sample. Evidence of satisfactory convergent validity included moderate to high correlations with other measures of problem gambling. Using the standard DSM-IV cut-score of five, the ten criteria were found to yield satisfactory classification accuracy results with a high hit rate (.95), high sensitivity (.92), high specificity (.99), low false positive (.01), and low false negative rate (.08). Lowering the cut score to four resulted in modest improvements in classification accuracy and reduced the false negative rate from .08 to .05. The Spanish translation of a measure of DSM-IV diagnostic criteria for PG demonstrated satisfactory psychometric properties and a cut score of four improved diagnostic precision.