A comprehensive workplace intervention and its outcome with regard to lifestyle, health and sick leave: the AHA study

This study is a prospective multicentre cohort study entitled Work and Health in the Processing and Engineering Industries, the AHA Study (AHA is the Swedish abbreviation for the study). Four large workplaces in Sweden participated during the years from 2000 to 2003. The present report has two objectives: (1) to present a comprehensive occupational health intervention programme and (2) to evaluate this programme with a focus on lifestyle (smoking and exercise), health related quality of life (HRQoL) and sick leave. Interventions were provided on an individual and group level, including evidence-based methods for four health/focus areas (individual level) and a group intervention based on a survey-feedback methodology. The analyses in this report were exclusively employed at an organizational level. The proportion of smokers decreased at three companies and the course of the HRQoL was advantageous at two of the companies as compared to a gainfully employed reference group. A significant decrease in sick leave was revealed at one company, whereas a break in an ascending sick-leave trend appeared at a second company as compared to their respective corporate groups. This comprehensive workplace intervention programme appears to have had positive effects on smoking habits, HRQoL and sick leave.     

Linking long-term capacity management for manufacturing and service operations

For firms that combine manufacturing and service operations in one system, the task of managing capacity is not straightforward. New goods and services may not have the same set of competitive priorities, and the models and concepts available in the literature for service operations differ from those for manufacturing operations. We address this problem and review the concepts and models for capacity management in the long term in both streams of literature, i.e. manufacturing and services, to develop a unified framework for manufacturing and service operations. The framework creates transparency between new goods manufacturing and service operations, since the same long-term capacity management structure is used for both product types, as well as between capacity strategy and planning strategy, since new goods and services are treated simultaneously. In the framework, the concepts of chase and level strategies are redefined for service operations to allow for integration with manufacturing operations. A case study demonstrates the usefulness of the integrated approach for long-term capacity management.     

An Empirical Analysis of Virtual Goods Permission Rights and Pricing Strategies

With the rapid development of the virtual world industry in the past few years, trading of virtual goods and services has grown significantly. Virtual goods creators can set different permissions to their creations, such as the length of usage, the ability to copy or modify a virtual good, or the ability to give the good to others. The permissions of virtual goods endow their creators with additional power to control the allocation and exchange of virtual goods in a virtual world. We examine how the unique virtual goods permission settings (copy, modify, and transfer) and other factors are associated with virtual goods prices. Using data from a Second Life marketplace, we find that permissions of virtual goods are not random, as creators strategically set the permissions for their virtual creations. Our results show that the copy and transfer permissions are significant factors associated with virtual goods prices. The impact of other factors on virtual goods prices is analyzed and managerial implications are discussed.     

Clickstream Data and Inventory Management: Model and Empirical Analysis

We consider firms that feature their products on the Internet but take orders offline. Click and order data are disjoint on such non‐transactional websites, and their matching is error‐prone. Yet, their time separation may allow the firm to react and improve its tactical planning. We introduce a dynamic decision support model that augments the classic inventory planning model with additional clickstream state variables. Using a novel data set of matched online clickstream and offline purchasing data, we identify statistically significant clickstream variables and empirically investigate the value of clickstream tracking on non‐transactional websites to improve inventory management. We show that the noisy clickstream data is statistically significant to predict the propensity, amount, and timing of offline orders. A counterfactual analysis shows that using the demand information extracted from the clickstream data can reduce the inventory holding and backordering cost by 3% to 5% in our data set.     

The educational attainment of second-generation immigrants in The Netherland

Since the mid-1960s the Netherlands has had a positive net immigration, mainly because of man power recruitment from Turkey and Morocco and immigration from the former Dutch colony of Surinam. Immigrants havea weak labor market position, which is related to their educational leveland language skills. Children and grandchildren of immigrants are expected to have a better chance of integration into Dutch society. In this paper we investigate whether this is true with respect to the educational attainment of second-generation immigrants from Turkey, Morocco, Surinam and the Dutch Antilles.The authors thank an anonymous referee and both editors for helpful comments. Responsible editors: David Card and Christoph M. Schmidt.     

Adjustment failures in an immigrant population: Finns in Sweden

Using data sets from both Sweden and Finland, which have been linked at the individual level, we analyse whether Finnish immigrants who lived in Sweden in 1990 were employed, non-employed, return-migrated, or dead by 2001. The aim is to see how they interrelate with socio-demographic characteristics, and to compare Finnish-speaking and Swedish-speaking immigrants in this respect. Multinomial logistic regression models reveal that there is great variation in the level of outcomes between the two language groups, but that the interrelation between socio-demographic factors and each outcome is fairly similar across outcomes and across language groups. It is foremost the Finnish-speaking male immigrants who experience problems, having on average two times higher odds of being either non-employed, return-migrated, or death, as compared with Swedish-speaking male immigrants. Social disadvantage may consequently not only take the form of poor labour market position, but also return-migration and death. The paper illustrates the need for separating subgroups of immigrants when one is interested in integrational success. Comments from seminar participants at the Turku Centre for Welfare Research and anonymous persons are gratefully acknowledged.     

Stability of environment and of insect populations

Summary The abundance of moths was monitored with light-traps in two sites in southern Bohemia, České Budějovice for 22 years and in Černiš for 9 years. In these sites, that are vastly different in environmental stability and predictability, stability of insect populations was studied. The amplitude of fluctuations in abundance of the insect populations, as measured by the coefficient of variation (CV), varied a great deal between species so that there was a large overlap between the two sites. Nevertheless there was a highly significant tendency for species at Černiš, the more stable site, to have smaller values of CV, i.e., to be less fluctuating. Also in species co-occurring in the two sites, the CV at Černiš tended to be smaller. Trends in abundance of individual species over time, both increases and decreases, were common in both sites and did not differ between habitats. Environmental stability begets insect population stability in terms of the amplitude of the fluctuations, but trends in time occur irrespective of stability of the habitat.     

Racial differences in infant mortality by cause of death: The impact of birth weight and maternal age

This research examines racial disparities in infant mortality, overall and separately according to cause of death. Using linked birth and death records for the 1975 cohort of live births in Florida, racial differences are initially described and then explained statistically as a product of the distribution of births by birth weight and maternal age. The impact of birth weight is more pronounced than is the effect of maternal age. The analysis suggests the potential utility of examining infant mortality separately by cause of death. Based on the findings, we argue for systematic research focused on factors affecting birth weight.     

A demographic examination of grandparent caregivers in the Census 2000 Supplementary Survey

As part of the 1996 Welfare Reform Act, the Census Bureau is required to determine how many grandparents are serving as caregivers to a grandchild. Using data from the Census 2000 Supplementary Survey, this paper presents demographic information on two types of grandparent households, and outlines the challenges associated with use of the new questions about grandparent care developed by the Census Bureau. We compare skipped-generation households, in which a grandparent and grandchild coreside but no parent is present, to three-generation shared-care households in which the grandparent claims primary responsibility for the grandchild. We focus on two geographic regions of the United States, New England and the Deep South, providing the first report on the prevalence and characteristics of these households, and the extent to which these attributes are geographically variable. We estimate that the population of three-generation shared-care families is at least as large as the population ofskipped-generation grandparent care families.We identify a number of differences between skipped-generation and shared-care households, especially with respect to the age of the grandchildren involved and the levels of economic hardship. Significant regional differences are also observed, with grandparent care households of both types being more common in the Deep South than in New England. We conclude that data using these new questions have the potential to greatly enrich our demographic understanding of grandparent households by shedding new light on a type of grandparent care often hidden from analysis: grandparents who are responsible for grandchildren in three-generation households.     

Will Future Immigration to Sweden Make it Easier to Finance the Welfare System?

Will future immigration to a country with a large public sector alleviate the increasing burden on the public welfare system due to an ageing population? The question is based on the experience that the age structure of immigrants differs from that of the native population. Fiscal impacts due to immigration depend mainly on the size, the age composition and the labour market integration of the additional population which arises because of immigration. A projection from Statistics Sweden about future immigration combined with the latest Long-Term Survey of the Swedish Economy has been used in this study. Calculations for Sweden up to the year 2050 show that the positive net contribution to the public sector from the additional population is rather small even with good integration into the labour market. The reason is that future immigration will increase the size of the population and thereby raise not only revenue from taxation but also public expenses. The fiscal impact is sensitive to the labour market integration of the additional population. The yearly positive/negative net contribution effect is less than 1% of GDP for most of the years. On the whole, the results are about the same even if we change the assumptions concerning the composition of future public revenues, the growth of public expenses, return migration, or the age-specific birth and death rates in the additional population. More considerable net fiscal effects would require a much higher and probably unrealistic level of future immigration.