Break point detection for functional covariance

Many neuroscience experiments record sequential trajectories where each trajectory consists of oscillations and fluctuations around zero. Such trajectories can be viewed as zero-mean functional data. When there are structural breaks in higher-order moments, it is not always easy to spot these by mere visual inspection. Motivated by this challenging problem in brain signal analysis, we propose a detection and testing procedure to find the change point in functional covariance. The detection procedure is based on the cumulative sum statistics (CUSUM). The fully functional testing procedure relies on a null distribution which depends on infinitely many unknown parameters, though in practice only a finite number of these parameters can be included for the hypothesis test of the existence of change point. This paper provides some theoretical insights on the influence of the number of parameters. Meanwhile, the asymptotic properties of the estimated change point are developed. The effectiveness of the proposed method is numerically validated in simulation studies and an application to investigate changes in rat brain signals following an experimentally-induced stroke.     

Health Care in Asia and the Pacific: Increasing the focus on social health insurance

This paper focuses on health insurance reform within the broader frameworks of both social security and health services system development. In most countries in Asia and the Pacific, it is indeed the reform of the health services system, through policy changes in health care financing, that has led to an increased focus on health insurance. The underlying issue in this reform is the shift in responsibility that has taken place in most countries in the region over recent years. In the past, governments were responsible for financing health care for their populations. This shifted to defining, legislating and implementing an appropriate health care financing mechanism, presenting several challenges: to reach universal health insurance coverage through new initiatives for new populations, mainly the informal sector accounting for the majority of the population in almost all these countries; to apply provider payment systems that enable control over costs and the volume of utilization; and to strengthen primary health care as a foundation for rational utilization and more resources for prevention, including prevention of chronic diseases among the ageing population. This approach will require an active partnership between health insurance schemes and government that should reflect the new division of responsibilities to guarantee access to high-quality health care for all.     

A comment on Wong and Waite, “Elder mistreatment predicts later physical and psychological health: Results from a national longitudinal study,” JEAN Issue 29(1), pp. 15–42

Wong and Waite present a longitudinal study of elder abuse and its effects. However, they contend that their data do not support the protective effects of social support, a finding in contrast with virtually all existing research on the topic. Closer inspection of their variables indicates that they misclassify elder abuse insofar as their results are actually in terms of only one type of elder abuse, psychological abuse, ignoring physical and sexual abuse. They also define “elder abuse” using only one question: “Is there anyone who insults you or puts you down?” Finally, they measure social support with the single item: “if they generally feel they can open up to, and rely on, these significant others.” It is not, therefore, surprising that they observed that social support was not protective considering health outcomes.     

Interventions for families with multiple problems: Similar contents but divergent formats

For families with multiple problems (FMP), knowledge is lacking on the practice elements of interventions (the distinct techniques practitioners use to promote positive outcomes) and their program elements (intervention design and delivery systems). The aim of this study is to identify both common and specific practice and program elements so as to determine contents and overlap between interventions. For FMP, we selected interventions that had at least moderate (>0.5) effect sizes in the Dutch context (N = 8). A deductive content analysis was used to assess the manuals of these interventions with the taxonomy of interventions for FMP. We defined as common those elements found in at least five of the eight interventions and as specific those found in fewer than five. Of the practice elements, 79% were common across the interventions, and 21% were intervention specific. Interventions with the highest percentages of intervention‐specific elements derived from the taxonomy were 10 for the Future (15%), Family Central (14%), Intensive Family Therapy (14%), and Multisystemic therapy (11%). Core program elements: duration, intensity, intervision, supervision, and consultation, varied greatly between interventions. Among interventions for FMP, we found practice elements to have considerable overlap. Among program elements, we found greater variety.     

US Presidential Elections and the Spatial Pattern of the American Second Demographic Transition

This research note is a sequel to an earlier article in this journal (Lesthaeghe and Neidert 2006) in which we documented a strong and robust spatial correlation between the 2000 and 2004 presidential election results on the one hand and the extent to which states and counties had evolved on the “second demographic transition” (SDT) dimension. At that time the critique was voiced that this was an exceptional result valid for the Bush elections only, given the prominence of the “culture war” issues during these election campaigns. This correlation was predicted to shrink substantially if economic issues instead of cultural and life style ones were dominant campaign topics. The 2008 Obama–McCain contest provides a good test for this proposition, since the elections took place at a time when economic issues had risen to great prominence in the debate. In this note we show that the spatial association between the vote for McCain and the county‐ or state‐level values on the SDT dimension remained as strong and as robust as before. Moreover, controls for competing explanations again failed to weaken or eliminate the correlation with the SDT dimension. Instead, anomalies in the correlations in 2004 for several Southern and Appalachian states disappeared in 2008.     

Health Care Reform and the Behavioral Health Workforce

Health care reform will increase the number of individuals who have access to substance abuse services. This impending influx of consumers has the potential of overwhelming the service capacity of providers within the field. Provisions included in the reform legislation might fall short of their intended goal to expand the number of service providers needed to deliver services. This article discusses unmet treatment need in the United States, the current numbers of service providers, and provisions within the reform legislation to increase the labor force. Recommendations are set forth that could help expand the number of providers in the field.     

Executive Function in Pathological Gamblers and Healthy Controls

Executive function (EF) deficits may underlie some of the impulse control problems seen in pathological gambling. Pathological gamblers (PGs, n = 45) and controls (n = 45) were compared on several measures of EF (including measures of response inhibition, working memory, cognitive flexibility and perseveration, planning and decision-making), as well as memory and intelligence tests to examine whether PGs evidence EF dysfunction. Compared with controls, PGs exhibited specific deficits on measures of planning and decision-making. PGs also exhibited relative deficits on a measure of perseveration, but this deficit was no longer significant after controlling for group differences in intelligence. These results suggest that PGs may experience deficits on specific components of EF.     

Do incident and perpetrator characteristics of elder mistreatment differ by gender of the victim? Results from the National Elder Mistreatment Study

Perpetrator and incident characteristics were studied in regard to incidents of emotional, physical, and sexual mistreatment of older adults (age 60+) in a national sample of older men and women. Random digit dialing across geographic strata was used to compile a nationally representative sample; computer assisted telephone interviewing was used to standardize collection of demographic, mistreatment, and perpetrator and incident characteristics data. The final sample size consisted of 5,777 older adults. Approximately one in ten adults reported at least one form of mistreatment, and the majority of incidents were not reported to authorities. Perpetrators of physical mistreatment against men had more "pathological" characteristics compared to perpetrators of physical mistreatment against women. Perpetrators of physical mistreatment (compared to emotional and sexual mistreatment) also evidenced increased likelihood of legal problems, psychological treatment, substance use during incident, living with the victim, and being related to the victim. Implications for future research and social policy are discussed.     

The effect of local livestock population changes on auction market viability—a spatial analysis

This paper examines the relationship between auction market closures over the period 1980–2000 and livestock population changes, as recorded in the agricultural and horticultural census. Auction market locations and census data were collated within a Geographical Information System and changes in livestock populations examined by region and by market catchment. Regionally, auction market closures during the 1980s were significantly associated with concurrent reductions in cattle numbers, with market reductions following loss of cattle in eastern lowland areas. No such association with livestock numbers was found during the 1990s. Within these agricultural regions, individual market closures were not associated with changes in local livestock numbers within their catchments. Thus, the historical evidence suggests that whilst a substantial loss of livestock within a region puts pressure on its network of auction markets, the viability of individual markets within the region is decided by other factors. Such factors include the capital costs of modernising market facilities and meeting new regulatory requirements, the effect of unpaid debt on market cashflow, and the market's ability to diversify into other areas of business. The recent outbreak of foot and mouth disease may lead to further market closures, both directly as a result of livestock culls and indirectly as farmers continue to use alternative marketing channels developed when auction markets were closed during the outbreak.