Horizontal and vertical island biogeography of arthropods on green roofs: a review

From an ecological perspective, urban green roofs can be viewed as green islands embedded in an urban matrix. Island biogeography theory suggests that species richness on an island is the outcome of dynamic equilibrium between immigration and extinction. Immigration is affected by the size of an island and distance of an island from a colonizing source. In the context of green roofs, building height and horizontal distance from green areas can potentially be a limiting factor for many species. Here, we considered two distance components of green roofs - vertical (building height) and horizontal (distance of building from open green areas). Based on island biogeography theory, we would expect species richness or community similarity to be negatively related to horizontal or vertical distances from colonizing sources. The green roof literature addressing such questions is currently sparse. In our review comprised of 10 studies, we were unable to identify consistent statistically significant richness-distance or community similarity-distance (vertical or horizontal) relationships. The absence of statistically significant relationships could be due in large part to low statistical power as a consequence of both the paucity of roofs and limited range of vertical distances in many of the existing studies. In addition, these roofs differ in numerous aspects (e.g. roof size, age, substrate type, plant composition and building height). The low number of replicates, combined with the lack of homogeneity among replicates combines to reduce statistical power and our ability to detect differences.     

Financial insecurity and risk experiences of justice involved persons with severe mental illness

More information is needed about the financial experiences of justice-involved persons with severe mental illness. Qualitative and quantitative methods were used to examine the financial resources, financial risk experiences, and financial literacy of a random sample of 12 mental health court participants. Mental health court participants had limited financial resources, frequently ran out of money, and had engaged very few financial tools to manage their money. Justice-involved persons with severe mental illness need financial management interventions to help develop strategies for managing depleted resources and to develop the financial resources needed to live in community settings.     

Changes in inequality and unemployment over the 1980s: comparative cross-national responses

This paper reviews the research evidence regarding high and persistent unemployment in the western European nations and widening inequality in the United States and selected European countries. It has been suggested that both of these problems are due to fundamental economic shifts in labor demand within the more industrialized world that have led to declines in the demand for less skilled workers: The effect on countries with more regulated labor markets was rising unemployment, while in less regulated labor markets it was rising wage inequality. The paper considers the evidence for this hypothesis, as well as the research questions and policy issues that it raises.The author thanks Rebecca London and Leslie Moscow for research assistance.     

The effects of poverty on sleep problems in Sweden

Does relative poverty measured as low disposable household income or the presence of personal financial crisis affect health measured in terms of self-reported sleep problems? If so, is this effect modified by macroeconomic conditions or life changes such as unemployment experience, divorce or limiting illness, and it is buffered by social networks or coping behavior such as smoking? These questions are studied on a representative sample of employed people aged 20-65 who participated in the Survey of Living Conditions conducted by Statistics Sweden for the years 1980-1981 (7180 people) and 1986-1989 (13,376 people). The results reveal a conditional relationship between poverty and sleep problems. Among men it is modified, in particular, by previous experience of unemployment. Among women strong social networks buffers the effect but smoking aggravates it. Men's sleep was affected more by poverty and unemployment in the late 1980s than in the earlier period.     

Hearth and Home: The Living Arrangements of Mexican Immigrants and U.S.-Born Mexican Americans

Utilizing data from the nationally representative, 1990 Panel Study of Income Dynamics—Latino Sample, this paper examines the living arrangements of Mexican heritage persons in the U.S., comparing immigrants to U.S. natives. Mexican immigrants are most likely to live with extended kin and unrelated persons upon recent arrival to the U.S. As time in the U.S. increases, such arrangements become less common. Three competing explanations for this pattern are addressed. While economic resources and life course stages are clearly linked to household formation for immigrants and U.S. natives, the findings indicate limited support for an acculturation hypothesis.     

When 'Choice' and 'Choice' Are not the Same: Institutional Frameworks of Choice in the German Welfare System

The creation and strengthening of welfare markets in Germany means that citizens can increasingly choose among competing providers of welfare goods and services. However, the conditions under which citizens may exercise choice in various fields of social policy are quite different. A major reason for these differences can be found in the public institutions that frame citizens' choice in welfare markets. This article analyses welfare markets in German health care, long-term care, pensions and employment policies, paying special attention to the respective public institutional frameworks. It will be argued that differences between frameworks of choice can be categorized by means of four parameters representing different aspects of public involvement in welfare markets. Depending on the kind and the degree of public involvement, welfare markets may be compatible with 'traditional' notions of public responsibility for citizens' social security.     

Dimensions of Internet use: amount,variety, and types

We examine the dimensions of Internet use based on a representative sample of the population of the UK, making three important contributions. First, we clarify theoretical dimensions of Internet use that have been conflated in prior work. We argue that the property space of Internet use has three main dimensions: amount of use, variety of different uses, and types of use. Second, the Oxford Internet Survey 2011 data set contains a comprehensive set of 48 activities ranging from email to online banking to gambling. Using the principal components analysis, we identify 10 distinctive types of Internet activities. This is the first typology of Internet uses to be based on such a comprehensive set of activities. We use regression analyses to validate the three dimensions and to identify the characteristics of the users of each type. Each type has a distinctive and different kind of user. The Internet is an extremely diverse medium. We cannot discuss ‘Internet use’ as a general phenomenon; instead, researchers must specify what kind of use they examine.     

Introduction to the special issue

No sociologist … should think himself too good … to make tens of thousands of quite trivial computations in his head and perhaps for months at a time (Weber 1946, p. 135). who has special interests in social change, political sociology, computers, methodology, and statistics. For the past decade he has been an independent consultant specializing in statistical data analysis and data base management for both mainframe and microcomputers.     

Expanding the learning day: an essential component of the community schools strategy

Community schools expand learning time and opportunities as one important dimension of a comprehensive strategy to ensure that students are ready for college, career, and citizenship.