Mathematical investigations of the escape from the Malthusian trap

We present a simulation model that synthesizes Malthusian and Boserupian notions of the way population growth and economic development were intertwined. The non‐linear stochastic model consists of a system of equations whose dynamics culminate in an industrial revolution after hundreds of iterations. The Industrial Revolution can thus be conceptualized as a permanent “escape”; from the Malthusian trap that occurs once the economy is capable of permanently sustaining an ever growing population. We investigate the conditions for such an escape and their sensitivity to the parameters of the model. This is done in an attempt to understand why some economies might have had difficulties escaping from the Malthusian trap (in contrast to the European experience in the eighteenth and nineteenth centuries). Our results show that the likelihood of an escape is sensitive to the savings rate and to the output elasticities of the two sectors of the economy. When not in a subsistence crisis, the chances that an escape will occur increase for larger values of the ratio of the savings rate to the growth rate of the population. The chances of an escape also increase substantially for larger values of the output elasticities of labor.     

南非运输业巨头Transnet的变革

Transnet是南非的国有运输企业，主要负责经营铁路、公路、港口、管道四大领域，是非洲最大的物流运输集团。对于“能量”二字，Transnet的理解自然是相当深刻的。     

Le travail dans les accords de préférence commerciale: état des lieux et perspectives

Alors même que l'Organisation mondiale du commerce (OMC) et le Cycle de développement de Doha laissent à l'OIT le soin de traiter les questions relatives au travail, cet article montre que les pays les plus actifs dans la conclusion d'accords de préférence commerciale incluent des dispositions sociales plus ou moins contraignantes. Les sanctions sont peu utilisées et le caractère protectionniste des «clauses sociales» n'est pas avéré. Ces clauses répondent à des objectifs divers et parfois contradictoires qui appellent différentes mesures qui s'orientent vers la promotion du renforcement des pratiques et la promotion du travail décent. L'auteur émet un certain nombre de suggestions à cet égard.     

Labour provisions in preferential trade agreements: Current practice and outlook

While the WTO and Doha Development Round do not deal with labour issues – they leave this to the ILO – the main countries that conclude free trade agreements incorporate labour provisions, which vary in terms of stringency. Sanctions are rarely used, and fears that “social clauses” would serve protectionist purposes have proved to be unfounded. Labour provisions are designed to meet a variety of sometimes conflicting goals, by means of different mechanisms aimed at improving labour practices and promoting Decent Work; the author makes a number of suggestions in this regard.     

Families by Adoption and Birth: II. Mother-Infant Cognitive Interactions

Adopted children are more likely to develop learning and school adjustment problems than are their nonadopted peers, despite that learning potential appears to be comparable in the two groups. In an effort to explain this phenomenon, the present study examined cognitive behavior repertoires in mothers and their healthy 5-month-old first infants during their normal daily routine in families by adoption and by birth. Two areas of functioning, vocal/verbal communication and exploration, were examined. Infants and mothers in both groups were similar in the frequency and ranking of a full array of age-appropriate cognitive behaviors. Both groups of babies experienced rich and comparable opportunities for the development of language competence. In the exploratory realm, group differences emerged for some infant measures; infants by birth were in an alert state and mouthed objects more than infants by adoption. Examination of the linkages among infant behaviors and between mothers and infants suggested that while mothers by birth and adoption provided comparable opportunities for exploration, infants by birth were engaging in exploratory behavior to a somewhat greater extent.     

Compliance check of gambler and youth protection in German amusement arcades: a pilot study

German gambling operators are required to identify problem gamblers at an early stage and exclude them from gambling on their premises. The main aim of this pilot study was to investigate the compliance of staff in Bremen’s amusement arcades. While visiting 29 of 111 amusement arcades, covert gamblers simulated signs of problematic gambling behaviour, arranged self-exclusions, monitored observance of the exclusion list and made fieldnotes about the staff’s reactions. The application of age checks was also tested. The findings showed that only in six cases (5%) did the staff adequately respond to evident signs of problematic gambling behaviour. Although 18 of 29 cases (62%) eventually resulted in self-exclusions or ban-like agreements, in some instances it was necessary to overcome major obstacles that emanated from the staff’s behaviour. During 15 subsequent follow-up visits, 13 banned mystery gamblers (87%) had no problems gambling on amusement-with-prizes (AWP) machines. Finally, just 26% of the 20- to 25-year-old mystery gamblers had their ID checked. The results indicate the necessity of regular external evaluations regarding the implementation of gambling harm-minimization measures in order to identify any shortcomings. In addition, the level of staff compliance may be increased by amending current legislation (e.g. by introducing a nationwide self-exclusion programme).     

Job demands and work-related psychological responses among Malaysian technical workers: The moderating effects of self-efficacy

Abstract

Job design has long been found to affect the work-related psychological responses of employees, such as psychological strain, job satisfaction, and turnover intentions, but scholars have begun to question whether established theoretical relations regarding job design continue to hold given the enormous changes in the nature of work during the past two decades. It is also increasingly recognized that individual differences affect work behaviours in substantial ways, but few studies on work design have investigated these differences. We addressed these concerns with a two-wave longitudinal study among 245 technical workers at a telecommunications company in Malaysia, a country that has a collectivist culture and a high power distance between managers and subordinates. We examined the moderating effects of job control and self-efficacy on the relationships between job demands and employee responses. The results failed to support the job demands-control model, as job control variables did not moderate the impact of demands on employee work-related psychological responses. However, self-efficacy moderated their impact on psychological strain (although not on job satisfaction or turnover intentions). Our findings provide insight into the moderating effect of self-efficacy, and suggest that practitioners interested in reducing psychological strain should consider making efforts to increase self-efficacy among employees.