MALARIA IN THE AMERICAS: A RETROSPECTIVE ANALYSIS OF CHILDHOOD EXPOSURE

This study considers the malaria-eradication campaigns in the United States (circa 1920), and in Brazil, Colombia and Mexico (circa 1955) in order to measure how much childhood exposure to malaria depresses labor productivity. The campaigns began because of advances in health technology, which mitigates concerns about reverse causality. Malarious areas saw large drops in the disease thereafter. Relative to non-malarious areas, cohorts born after eradication had higher income as adults than the preceding generation. These changes coincided with childhood exposure to the campaigns rather than with preexisting trends.Malaria, returns to health, eradication campaigns

School resource officers, 'zero tolerance' and the enforcement of compliance in the American education system

Schools are an important part of any community, and are increasingly considered responsible for the social education of young people as much as their academic instruction. In doing so, many schools have adopted a ‘zero tolerance’ response to student conduct that involves harsh penalties for minor infractions. At the heart of this zero tolerance approach is the use of School Resource Officers (SROs) as a means of enforcing student discipline. Involvement of these sworn police officers in the day-today behaviour management processes of a school has serious implications for students that are targeted by these measures. Students at schools with a SRO presence are five times more likely to be arrested for disorderly conduct, with over 10,000 prosecutions of young people under the so-called ‘disturbing schools’ laws every academic year. SROs and their use as a behavioural deterrent can be seen to influence a juvenile’s likelihood of recidivism and heavily impacts upon their involvement in the school-to-prison pipeline. Direct causal connections exist between the criminalisation of misbehaviour in school and adult incarceration; in this sense, the presence of SROs in American schools must be re-evaluated in order to determine whether they constitute an acceptable application of social control

The data and deviance: disintegrative shaming and exclusion in Queensland schools

It is the purpose of this study to determine the extent to which the implementation of the Positive Behaviour for Learning (PBL) model and its focus on data-driven behaviour management has impacted on exclusion rates in Queensland public schools and, as such, the commitment of Queensland public schools to reintegration of students with behavioural issues. Using the open source data on student exclusion rates and the reasons for exclusion, it is possible to determine shifting patterns over the last 10 years. In doing so, it has been possible to identify how the approach to exclusion in Queensland public schools has changed in the period since the introduction of the OneSchool data aggregation software. An analysis of exclusion data shows that while long-term suspensions have decreased over the last 10 years, the rate of short-term suspension and exclusion has increased. There has been a particular increase in disciplinary absences related to conduct issues like refusal to participate in class, rather than more serious violations like physical violence or drug use. Using Braithwaite’s reintegrative shaming model as a framework to analyse this behavioural exclusion data indicates that an over-reliance on exclusion is steering Queensland schools away from the principles of restorative justice, and has a negative impact on student outcomes

Joint segmentation of many aCGH profiles using fast group LARS

Array-Based Comparative Genomic Hybridization (aCGH) is a method used to search for genomic regions with copy numbers variations. For a given aCGH profile, one challenge is to accurately segment it into regions of constant copy number. Subjects sharing the same disease status, for example a type of cancer, often have aCGH profiles with similar copy number variations, due to duplications and deletions relevant to that particular disease. We introduce a constrained optimization algorithm that jointly segments aCGH profiles of many subjects. It simultaneously penalizes the amount of freedom the set of profiles have to jump from one level of constant copy number to another, at genomic locations known as breakpoints. We show that breakpoints shared by many different profiles tend to be found first by the algorithm, even in the presence of significant amounts of noise. The algorithm can be formulated as a group LARS problem. We propose an extremely fast way to find the solution path, i.e., a sequence of shared breakpoints in order of importance. For no extra cost the algorithm smoothes all of the aCGH profiles into piecewise-constant regions of equal copy number, giving low-dimensional versions of the original data. These can be shown for all profiles on a single graph, allowing for intuitive visual interpretation. Simulations and an implementation of the algorithm on bladder cancer aCGH profiles are provided

The group fused Lasso for multiple change-point detection

We present the group fused Lasso for detection of multiple change-points shared by a set of co-occurring one-dimensional signals. Change-points are detected by approximating the original signals with a constraint on the multidimensional total variation, leading to piecewise-constant approximations. Fast algorithms are proposed to solve the resulting optimization problems, either exactly or approximately. Conditions are given for consistency of both algorithms as the number of signals increases, and empirical evidence is provided to support the results on simulated and array comparative genomic hybridization data

Portage: path dependence and increasing returns in U.S. history

The authors examine portage sites in the U.S. South, Mid-Atlantic, and Midwest, including those on the fall line, a geomorphologic feature in the southeastern U.S. marking the final rapids on rivers before the ocean. Historically, waterborne transport of goods required portage around the falls at these points, while some falls provided water power during early industrialization. These factors attracted commerce and manufacturing. Although these original advantages have long since been made obsolete, the authors document the continuing-and even increasing-importance of these portage sites over time. They interpret this finding in a model with path dependence arising from local increasing returns to scale.Geography ; Urban economics

Age at Arrival, English Proficiency, and Social Assimilation Among U.S. Immigrants

Are U.S. immigrants' English proficiency and social outcomes the result of their cultural preferences, or of more fundamental constraints? Using 2000 Census microdata, we relate immigrants' marriage, fertility and residential location variables to their age at arrival in the U.S., and in particular whether that age fell within the "critical period" of language acquisition. We interpret the differences between younger and older arrivers as effects of English-language skills and construct an instrumental variable for English-language skills. Two-stage-least-squares estimates suggest that English proficiency increases the likelihood of divorce and intermarriage. It decreases fertility and, for some groups, ethnic enclave residence.

Big fish, small pond: NGO–corporate partnerships and corruption of the environmental certification process in Tasmanian aquaculture

Aquaculture is the single largest agribusiness in the Australian state of Tasmania, with local company, Tassal, the foremost producer of farm-raised salmon in the country. Tassal has come under considerable criticism for its environmental impact, despite the fact that since 2014, the Aquaculture Stewardship Council (ASC) and the World Wildlife Fund have certified it consistently as a sustainable business. This article argues that these endorsements are the result of a corrupt corporate arrangement that is designed purposefully to mislead consumers. It examines the considerable payments to both non-governmental organizations from Tassal and the questionable nature of the certification process administered by the ASC

"500 tokens to go private": camgirls, cybersex and feminist entrepreneurship

The adult entertainment industry has often been seen by feminist groups as antithetical to the women’s liberation movement, with the commercialisation of misogyny taking place under a patriarchal business model. The advent of live streaming video and webcam technology has forced a considerable paradigm shift in the power relationships involved in pornography; the burgeoning ‘camgirl’ genre— in which young women independently broadcast explicit material at the behest of an audience—essentially serves to return control over adult entertainment to the female participants that are involved in its creation. The interactive nature of the camgirl genre has resulted in the development of a unique transactional relationship between performer and consumer that transcends that which currently exists within the industry. The rise of the camgirl has significant implications for both the adult entertainment industry and internet culture on the whole, presenting innovative business opportunities for young performers to engage in entrepreneurial behaviour