Kernel Density Estimation on a Linear Network

This paper develops a statistically principled approach to kernel density estimation on a network of lines, such as a road network. Existing heuristic techniques are reviewed, and their weaknesses are identified. The correct analogue of the Gaussian kernel is the ‘heat kernel’, the occupation density of Brownian motion on the network. The corresponding kernel estimator satisfies the classical time‐dependent heat equation on the network. This ‘diffusion estimator’ has good statistical properties that follow from the heat equation. It is mathematically similar to an existing heuristic technique, in that both can be expressed as sums over paths in the network. However, the diffusion estimate is an infinite sum, which cannot be evaluated using existing algorithms. Instead, the diffusion estimate can be computed rapidly by numerically solving the time‐dependent heat equation on the network. This also enables bandwidth selection using cross‐validation. The diffusion estimate with automatically selected bandwidth is demonstrated on road accident data.     

Role of Relational Case Management in Transitioning from Poverty

One-off financial assistance through emergency relief provides a short-term intervention to immediate material crisis. However, recurrent instances of clients accessing this type of assistance points to the ineffectiveness of managing financial hardship without addressing the causes of long-term poverty. This article presents findings from an external process evaluation of the Salvation Army relational case management model known as Doorways. A mixed-method design was implemented, consisting of semistructured interviews, observations, and document analysis, as well as Client Satisfaction and Wellbeing Survey. Across the seven research sites semistructured interviews were conducted with 45 clients and nine case managers, and 30 client surveys were completed. Three themes will be discussed: the Doorways philosophy; the flexible service delivery approach; and client capacity building and continuity of care. Findings illustrated the effectiveness of a relational case management approach and reaffirm the central role of relationships in transforming the lives of people experiencing poverty.

IMPLICATIONS

• The quality of relationship between case managers and their clients plays an integral role in transforming the lives of people experiencing long-term or situational financial disadvantage.

• Service delivery requires a relational and flexible approach to adequately tailor support to the individual and contextual needs of clients.

     

Why women earn less than men in self-employment

Data from a sample of 659 selfemployed individuals are used to evaluate explanations for the large earnings differential between selfemployed men and women. A signifi-cant portion of the differential is attributed to differences in the industrial distribution of businesses and to the differential effects of housework and family responsibilites on the earnings of males and females. Differences due to industry position are traced to the lower proportions of women in the relatively rewarding areas of construction and professional practice and their greater representation in the relatively unrewarding personal services sector. Women in selfemployment appear to be burdened by house-work and childrearing in ways that limit the scope of their selfemployed businesses and the intensity of work effort in them. If selfemployed women were to have their total hours of labor redistributed between market work and house work in the same man-ner as men, their selfemployed earnings would be substantially increased. A portion of the differential is traceable to differences in financial capital (femalerun business have smaller capital stocks) and differences in specific human capital (female self-employed have less experience in running their business).     

Policy,citizenship and governance: the case of disability and employment policy in Australia

Current discussions regarding the relationship between welfare governance systems and employment promotion in disability policy appeal to a rejuvenated neo-liberal and paternalistic understanding of welfare governance. At the core of this rationality is the argument that people with disabilities not only have rights, but also duties, in relation to the State. In the Australia welfare system, policy tools are deployed to produce a form of self-discipline, whereby the State emphasises personal responsibility via assessment tools, ‘mutual obligation’ policy, and motivational strategies. Drawing on a two-year semi-longitudinal study with 80 people with a disability accessing welfare benefits, we examine how welfare governance subject recipients to strategies to produce productive citizens who are able to contribute to the national goal of maintaining competitiveness in the global economy. Participants’ interviews reveal the intended and unintended effects of this activation policy, including some acceptance of the logic of welfare-to-work and counter-hegemonic resistance to de-valued social identities.     

Assessing the Horatio Alger myth: Is self-employment especially beneficial for those from less-advantaged family backgrounds?

The findings of this study contradict the popular belief that self-employment is especially beneficial as a path to economic progress for those from more disadvantaged backgrounds. Data from the National Longitudinal Survey of Youth 1979 Cohort (NLSY79) show that the relative earnings gain from being self-employed rather than working for an organization actually increases with the level of socioeconomic background. Those from a higher socioeconomic background can expect to earn much more in self-employment than in organizational employment while those from the lower socioeconomic background can expect to earn much less. While there are some indications that the more disadvantaged are more likely to attain very high incomes if they do become self-employed, the percentage of this group who attain higher incomes through self-employment is lower than it is for higher socioeconomic groups.     

Influence of aboveground tree biomass,home age,and yard maintenance on soil carbon levels in residential yards

With the rapid urbanization of natural lands, researchers have begun to examine the capacity of urban soils to store carbon (C), with recent attention to residential yards. We performed a case study to examine four potential influences on soil C levels in residential yards. In 67 yards containing trees, we examined the relationship of soil C (kg m^?2) to tree aboveground biomass, home age (3–87 years), yard maintenance (fertilization, irrigation, mulching or bagging lawn clippings), and soil texture (% clay, % sand, % silt), at three depths (0–15 cm, 15–30 cm, and 30–50 cm). Six tree aboveground biomass data sets were developed: 1) biomass, 2) biomass*(1/distance from tree), 3) biomass?≤?15 m from sample site, 4) biomass?≤?10 m, 5) biomass?≤?5 m, and 6) biomass?≤?4 m. Biomass?≤?5 m and biomass?≤?4 m had the greatest explanatory power for soil C at 30–50 cm depth (P?=?0.001, R²?=?0.28; P?=?0.05 R²?=?0.39, respectively). The relationship between soil C and home age was positive at 0–15 cm (P?=?0.0003, R²?=?0.19), but constant at the two lower depths. Yard maintenance had no significant influence on soil C levels across home age. At 0–15 cm, soil C increased with % silt (P?=?0.006, R²?=?0.12). Overall, trees in turfgrass yards may have a stabilizing effect on soil C levels below 15 cm but minimal influence above 15 cm.     

Out of Work,Out of Mind: Response Errors in Retrospective Reports of Unemployment

This article examines several aspects of the validity of retrospective reports of unemployment, obtained by a comparison of respondent reports with company records for a sample of workers from a large manufacturing firm. We find that reports of the total amount of unemployment in the calendar year prior to the interview are reasonably accurate, but reports of the timing of spells of unemployment within the year are much less accurate. Estimates of a regression model relating response error to measures of respondent characteristics, the length of the recall period, the difficulty of the reporting task, and the likely salience of the events show that the salience measures are clearly the most important and that time and demographic factors are relatively unimportant predictors of response error.     

Transmission of Ideology Through Film: The Cinematic Construction of Gendered Domination in Mr. Deeds Goes to Town

Contemporary applications of behavioral and social science to the understanding of how cinematic narratives influence viewers tend to be bifurcated. Cognitive film/media theorists and psychologists emphasize microlevel processes at the expense of the macrolevel. Sociological approaches emphasize macrolevel analysis at the expense of the microlevel. Bridging these two levels is the mesolevel concept of identification elaborated to apply to stereotypic role relationships; that is, schemas or associative networks linking thoughts, memories, emotions, and behaviors. Here assumptions of Social Cognitive Theory and Transactional Analysis are employed to contextualize a discussion of how cinematic narrative can operate to construct an ideologically hegemonic narrative reinforcing the legitimation of gendered domination at the sociocultural (macro)level of analysis.     

Multicultural education: the state of play from an Australian perspective

This article reports on the first comprehensive survey of public school teachers in the Australian state of New South Wales (NSW) around issues of multicultural and English as Second Language (ESL) education. While there is substantial literature on multicultural education – what it should and shouldn’t be – there is much that is left unexplored in research in the area, not least of which is the characteristics of the teaching labour force. In this article, we ‘take stock’ of multicultural education, not by engaging with philosophical debates about multiculturalism as an ethical or policy practice, but as an auditing of what exists in the name of multicultural education. Drawing on a sample of over 5000 respondents, the article documents the changing cultural profile of the profession and highlights gaps in pre-service training and professional learning of teachers in terms of meeting the needs of Australia’s increasingly culturally and linguistically complex school populations.