Comparing three alternative types of employment with permanent full-time work: How do employment contract and perceived job conditions relate to health complaints?

Previous research has found that alternative employment arrangements are associated with both impaired and improved well-being. Since such inconsistencies are likely to derive from the type of employment contract as well as the characteristics of the job, this paper compares permanent full-time work with forms of alternative employment (permanent part-time, fixed-term and on-call work) in order to investigate how different employment contracts and perceptions of job conditions relate to individual well-being. This study contributes to the literature by addressing several questions. Different forms of alternative employment are distinguished and individual background characteristics that might be intertwined with the employment contract are controlled for. Moreover, the scope of this study extends to the effects of perceived job conditions, and possible interactive effects with type of employment are tested. Analyses of questionnaire data from 954 Swedish healthcare workers show that perceptions of the job (job insecurity, job control and demands), but not the type of employment contract, predicted health complaints. However, type of employment interacted with perceptions of job insecurity, in that insecurity was associated with impaired well-being among permanent full-time workers, while no relationship was found for on-call or core part-time employees. Despite the absence of interactions between employment contract and job demands or job control, it can be concluded that knowledge about the relationship between alternative employment arrangements and the well-being of workers can be enhanced when the combined effects of employment contract and job conditions are studied.     

生鲜物流配送中心配送管理子系统的实证研究

目前,新的农产品销售组织业态生鲜超市正在兴起,这一业态的核心是生鲜物流配送中心,而配送管理子系统是又是物流系统规划中非常重要的部分,由于生鲜配送对保鲜、运输条件和时间的限制,对配送管理子系统的规划设计提出了很高要求.本文在实证研究的基础上,以某公司生鲜物流配送中心配送管理子系统规划为例,对其进行了研究.     

Using housing items to indicate socioeconomic status: Latin America

This note explores the possibility of using physical housing quality information from censuses to help indicate socioeconomic status, particularly that of children, elderly people and women in developing areas such as Latin America. We develop a comparative scale from six housing items (wall material, floor material, roof material, availability of electricity, type of sewerage and water facilities) since these items are recommended by the U.N., tend to be present in most housing censuses, tend to be highly related to each other and tend to have a similar valuation. A more basic three-item scale, consisting of the last three items listed above, is also discussed because this scale might be even more widely available while providing valuable, aggregated, information. The six-item and three-item scales correlate highly with each other. There is a wide range among Latin American countries in people's distribution along the scales but the scales themselves seem applicable everywhere. Not only have they been proving useful in our own research, but both scales correlate fairly well with a country's infant mortality rate on the aggregate level and with an individual's educational attainment among men and women 15 to 59 and among elderly people 60 years of age and older.     

Monte Carlo co-ordinate ascent variational inference

Statistics and Computing - In variational inference (VI), coordinate-ascent and gradient-based approaches are two major types of algorithms for approximating difficult-to-compute probability...     

The determinants of breastfeeding for Mexican migrant women

This article develops an economic model for assessing Mexican agricultural migrants' decision to breastfeed in a sample of 137 women in 3 agricultural communities in California. The resulting hypotheses from the model are linked to health care and welfare program access, cultural factors, and employment. Using a probit analysis of the variables, a major finding is that non-traditional practices such as out-of-home child care, birth control, and alcohol use have a negative impact on the probability of breastfeeding. These findings were consistent with the hypothesis that women with more traditional values would be more likely to breastfeed. The authors also found that working women in the sample population were less likely to breastfeed.     

A psychometric evaluation of a Dutch version of the Job Content Questionnaire and of a short direct questioning procedure

Using the demand-control-support perspective on job stress, a Dutch translation of an adapted version of the Job Content Questionnaire (AJCQ) was administered to a large population ( N = 3638) of Flemish workers in a variety of jobs, together with the General Health Questionnaire, and a negative affectivity scale. Overall, the AJCQ was shown to be a solid measurement instrument as indicated by several estimated reliability indices and validity of the subscales. A factor analysis largely reproduced the a priori structure of the AJCQ. A short 10-item direct questioning procedure was constructed to measure the 10 subscales of the AJCQ and the results of this procedure were compared with the AJCQ in a subsample ( N = 660). The correlations with six criterion variables showed that single questions were equally predictive than the much longer version of the AJCQ.     

Trends and Socioeconomic Gradients in Adult Mortality around the Developing World

We combine data from 84 Demographic and Health Surveys from 46 countries to analyze trends and socioeconomic differences in adult mortality, calculating mortality based on the sibling mortality reports collected from female respondents aged 15–49. The analysis yields four main findings. First, adult mortality is different from child mortality: while under‐5 mortality shows a definite improving trend over time, adult mortality does not, especially in sub‐Saharan Africa. The second main finding is the increase in adult mortality in sub‐Saharan African countries. The increase is dramatic among those most affected by the HIV/AIDS pandemic. Mortality rates in the highest HIV‐prevalence countries of southern Africa exceed those in countries that experienced episodes of armed conflict. Third, even in sub‐Saharan countries where HIV prevalence is not as high, mortality rates appear to be at best stagnating, and even increasing in several cases. Finally, the main dimension along which mortality appears to differ in the aggregate is by sex. Adult mortality rates in sub‐Saharan Africa have risen substantially higher for men than for women—especially so in the high HIV‐prevalence countries. On the whole, the data do not show large gaps by urban/rural residence or by school attainment.     

“赔命价”的基本理念及其对现代刑事法治的借鉴功能

“赔命价”在传统社会作为一种法文化对解决杀人案件具有重要的影响.但在基本理念上,“赔命价”与我国刑法之间有着很大的差别.从构建和谐法治的视角来审视,“赔命价”对我国的刑事法治建设又具有一定的借鉴作用.     

Enhancing Self‐Protective Behavior: Efficacy Beliefs and Peer Feedback in Risk Communication

In times of a high‐impact safety incident citizens may have a variety of sources available to help them cope with the situation. This research focuses on the interplay of efficacy information in risk communication messages and peer feedback, such as responses on social network sites (SNSs) in the context of a high‐impact risk on the intention to engage in self‐protective behavior. The study pitted high and low efficacy information messages against supporting and opposing peer feedback (N = 242). Results show a significant interaction effect between efficacy information in a news article and peer feedback from SNS messages on both the intention to engage in self‐protective behavior and levels of involvement. Participants who received the article with more efficacy information and also received supportive peer feedback via SNS messages were more likely to express higher levels of involvement and greater intentions to engage in protective behavior. When confronted with a low efficacious news article, the effect of peer feedback on these two variables was significantly stronger. Finally, implications for theory and government risk communication are discussed.     

Group Conflict Theory in a Longitudinal Perspective: Analyzing the Dynamic Side of Ethnic Competition

One of the most established approaches to explain attitudes toward immigration is group conflict theory. However, even though the theory was articulated in dynamic terms, previous research has almost exclusively tested it through cross‐sectional analyses. The aim of this study is to disentangle the dynamic character of ethnic competition from more permanent determinants of ethnic threat. The findings show that a remarkable variation of concern over immigration, usually attributed to permanent positions of economic vulnerability, disappears when within‐person variation is modeled. In line with a dynamic approach of ethnic competition, becoming unemployed or being laid off increases concern over immigration. This effect is independent of social class.