IDENTIFICATION AND ESTIMATION OF CAUSAL EFFECTS WITH TIME‐VARYING TREATMENTS AND TIME-VARYING OUTCOMES*

We develop an approach to identifying and estimating causal effects in longitudinal settings with time–varying treatments and time–varying outcomes. The classic potential outcome approach to causal inference generally involves two time periods: units of analysis are exposed to one of two possible values of the causal variable, treatment or control, at a given point in time, and values for an outcome are assessed some time subsequent to exposure. In this paper, we develop a potential outcome approach for longitudinal situations in which both exposure to treatment and the effects of treatment are time-varying. In this longitudinal setting, the research interest centers not on only two potential outcomes, but on a whole matrix of potential outcomes, requiring a complicated conceptualization of many potential counterfactuals. Motivated by sociological applications, we develop a simplification scheme—a weighted composite causal effect that allows identification and estimation of effects with a number of possible solutions. Our approach is illustrated via an analysis of the effects of disability on subsequent employment status using panel data from the Wisconsin Longitudinal Study.     

Wind farms in rural areas: How far do community benefits from wind farms represent a local economic development opportunity?

Although the large-scale deployment of renewable technologies can bring significant, localised economic and environmental changes, there has been remarkably little empirical investigation of the rural development implications. This paper seeks to redress this through an analysis of the economic development opportunities surrounding wind energy development in rural Wales. The paper concludes that the economic development outcomes to rural areas from wind generation projects to date have been questionable. Increasing the flow of conventional economic benefits to rural economies in terms of incomes and jobs is shown to be difficult because of the nature of the local supply side in remote areas. Partially as a consequence of this, developers of wind farms have come to routinely provide diverse forms of community benefits to ‘affected communities’, but these have yet to evolve into significant tools of economic development. In any case, the flows of revenues from community benefits are dwarfed, in quantitative terms, by the revenue streams that might be channelled to rural areas through a broader community ownership of wind energy projects. However, although a few local successes have been achieved, the scope for realising the returns from community ownership remains low in the Welsh case, with a series of impediments considered. We close the paper by suggesting means through which economic outputs might be improved.     

Experienced support from family,school and friends among students in out‐of‐home care in a school‐based community survey

Youth in out‐of‐home care have elevated risks for adverse events and detrimental circumstances possibly affecting their development. Responses from 311 students in out‐of‐home care (OHC) were compared with peers living in birth parent care (BPC) and in single birth parent care (sBPC) in a regional school survey, directed to students in compulsory school eighth year and upper secondary school second year. Results indicate OHC students to experience less satisfaction with friends, leisure time, and families. They state less trust in support from friends and families but a more similar level to teachers, counsellors or nurses. OHC students also express being more exposed to abusive experiences online and perceive less sense of security at home and in school. We conclude that welfare institutions need to recognize the components in building trust and safety for students in OHC and that school and other professional institutions have an important role in serve resilience and promote well‐being for children in OHC.     

Young People's Participation — Where Next?

This article is about young people in the UK's participation in decisions that affect them. It draws, in particular, on three research and evaluation projects that were undertaken in partnership with young people as researchers, and directly exploring the views and experience of young people of their participation in the voluntary and statutory sector. Its purpose is to contribute to reflection on young people's participation to review what has been done and what has been learnt, to consider what next, where our efforts should be focused in the future as adults and young people seek together to develop and implement meaningful opportunities for participation.     

Medical Treatment of Women with Lupus. The case for sharing knowledge and decision-making

Few women patients in this study were found to be active partners in the medical management of systemic lupus erythematosus (SLE). Despite the growing emphasis on doctors and patients sharing knowledge and decision-making power, most of the women were struggling to have their symptoms and needs taken seriously, and appeared relatively powerless in relation to the medical profession. Acknowledging patient expertise requires that doctors share some of their power, and we suggest this may be especially problematic when medical resources and power are primarily located in the hands of white men, and when the patients are typically women and often from the black community. Implications for action that are considered include maximising the influence of women with SLE on research, training and practice.     

Protecting ecosystems: network structure and social capital mobilization

The research reported here explores a community that amassedsocial capital in effective and diverse ways, enabling it tofight a corporate giant and protect critical, large watersheds.We explore how the dynamic interaction between network formationand network structure augmented community social capital, particularlybridging, for increased access to human and economic capital.Network structure(s) can create enabling conditions for themobilization of social capital within communities and for peopleto feel empowered to act. The research suggests that there isan opportunity for policy-makers to learn what kinds of policiescan enhance or destroy existing social capital in a community.     

Retirement and risk: the individualisation of retirement experiences?

A climate of uncertainty and risk exists in the field of retirement and pensions. Many employers have modified their pension schemes shifting the financial risk onto employees. Many individuals with private pensions have watched the value of their savings diminish. Added to this, the trend toward early retirement before state pension age has destabilised the traditional life course notion of a fixed retirement age, (especially for men). As a result, the concept of retirement itself has become more unpredictable and difficult to define. In this article we examine the extent of the individualisation of retirement experiences by reference to a study of retirement transitions in two organisations. The research investigated the influences on people's retirement decisions and the extent to which they experienced choice and control over how and when they retired. It is possible to identify a pattern of individualisation in contrast to its opposite of a mass transition into retirement, collectively understood and embedded in formal, institutionalised arrangements. However, underlying this fragmentation of experience there are clear structural patterns. The form that structured individualisation took here, was less to increase the majority of people's range of alternatives and choices over when and how to retire and more to enlarge the range of risks they had to cope with.     

The Impact of College Education on Fertility: Evidence for Heterogeneous Effects

As college-going among women has increased, more women are going to college from backgrounds that previously would have precluded their attendance and completion. This affords us the opportunity and motivation to look at the effects of college on fertility across a range of social backgrounds and levels of early achievement. Despite a substantial literature on the effects of education on women’s fertility, researchers have not assessed variation in effects by selection into college. With data on U.S. women from the National Longitudinal Survey of Youth 1979, we examine effects of timely college attendance and completion on women’s fertility by the propensity to attend and complete college using multilevel Poisson and discrete-time event-history models. Disaggregating the effects of college by propensity score strata, we find that the fertility-decreasing college effect is concentrated among women from comparatively disadvantaged social backgrounds and low levels of early achievement. The effects of college on fertility attenuate as we observe women from backgrounds that are more predictive of college attendance and completion.     

Civic Returns to Higher Education: A Note on Heterogeneous Effects

American educational leaders and philosophers have long valued schooling for its role in preparing the nation's youth to be civically engaged citizens. Numerous studies have found a positive relationship between education and subsequent civic participation. However, little is known about possible variation in effects by selection into higher education, a critical omission considering education's expressed role as a key mechanism for integrating disadvantaged individuals into civic life. I disaggregate effects and examine whether civic returns to higher education are largest for disadvantaged low likelihood or advantaged high likelihood college goers. I find evidence for significant effect heterogeneity: civic returns to college are greatest among individuals who have a low likelihood for college completion. Returns decrease as the propensity for college increases.     

Statistical precision of categorical PATH observations of trunk posture

Background: Field studies assessing biomechanical occupational exposures frequently utilize direct observation. PATH (Postures, Activities, Tools, and Handling) is a tool for systematically observing occupational exposures during non-cyclic or long, irregular-cycle jobs. While PATH has been used in many studies, its statistical performance under different data collection strategies has not yet been investigated. The purpose of the current study was to examine this issue. Methods: Data from labourers performing the four tasks comprising a 'Jacking Pit Construction' operation was extracted from a previously collected data set. Using a probability based re-sampling bootstrap approach, categorical trunk posture exposure data was compared across nine simulated data collection strategies. Results/Conclusion: At the operational level, dispersion curves showed consistent trends of increased precision with increased sizes of the data set and curves tended to intersect at the expected value seen in the parent data set. At the task level, curves did not always follow the predicted pattern, highlighting the potential pitfalls of using PATH for infrequent tasks and the striking effect that individual workers can have on group exposure estimates of such tasks.