67 research outputs found

    Securities Fraud as Corporate Governance: Reflections upon Federalism

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    State law gives corporate managers extremely broad power to direct increasingly large pools of collective business assets. Not surprisingly, economic incentives, norms, markets, and law all work to constrain the breadth of the power and the potential for abuse of what is other people\u27s money.\u27 State corporate law has occupied the center stage in the legal portion of this landscape, with federal securities law playing a supporting role-at least in the academic presentation of the debate. The New Deal\u27s securities legislation eschewed a general federal corporations statute in favor of a more focused federal role emphasizing disclosure and antifraud protections for those who purchase and sell securities. The Supreme Court has made clear that fraud as proscribed in federal law was not to be defined in a way that annexed corporate governance. And, in 1995, Congress expressed a clear desire to limit the use of federal securities fraud lawsuits, at least insofar as those lawsuits were perceived to be frivolous. Yet, as this Article demonstrates, federal securities law and enforcement via securities fraud class actions today have become the most visible means of regulating corporate governance. Securities fraud law is ostensibly directed at buyers and sellers of securities, but in the context of class actions, this purchaser-seller connection acts more like the minimalist jurisdictional hook of the interstate commerce requirement than a real constraint on the use of securities law to regulate corporate governance. Federal securities law is, of course, not the only legal constraint on managerial behavior, and a shareholder lawsuit based on disclosure is not the only litigation remedy. State law continues to provide the legal skeleton for the corporate form, and state fiduciary duty litigation continues as a mechanism frequently utilized to monitor managers. Yet, in today\u27s world, state law does so almost entirely in two contexts-acquisitions and self-dealing transactions. The empirical evidence in this Article illustrates that corporate governance outside of these areas has passed to federal law and in particular to shareholder litigation under Rule 10b-5

    Market Intermediation, Publicness, and Securities Class Actions

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    Securities class actions play a crucial, if contested, role in the policing of securities fraud and the protection of securities markets. The theoretical understanding of these private enforcement claims needs to evolve to encompass the broader set of goals that underlie the securities regulatory impulse and the publicness of those goals. Further, a clear grasp of the modern securities class action also requires an updated understanding of how the role of market intermediation in securities transactions has reshaped the realities of securities litigation in public companies and the evolution of the fraud cause of action in the context of open-market transactions. The Supreme Court’s embrace of market efficiency as a mechanism to establish reliance in its 1988 decision, Basic Inc. v. Levinson, illustrates the necessary adaptation of common-law fraud to the modern market setting, and congressional enactment of the PSLRA in 1995 exemplifies the efforts to respond to the litigation risks inherent in that adaptation. Together, Basic and the PSLRA provide a framework for understanding both a series of recent Supreme Court decisions on securities class actions and a different understanding of the theory undergirding those class actions. To develop this understanding, we expand the conversation about the goals of securities regulation to include the set of goals that are rooted in publicness and focus on market protection, innovation, and growth, as well as stability and systemic considerations. We posit that this broader theoretical understanding explains why the Court rejected a challenge to the fraud-on-the-market doctrine and, instead, permitted the continued use of market efficiency: the Court chose to preserve the deterrence and enforcement role of these cases in promoting market growth and innovation. We then apply this understanding of publicness and market intermediation to the interpretation of the Court’s limited, but ambiguous, use of “price impact” in securities-fraud cases. Our analysis reveals that the practical balance established by Basic and the PSLRA has prevailed over pure doctrinal approaches to issues like reliance or other, more incomplete, theoretical explanations focused solely on compensation, deterrence, and investor protection, but neglects the role of publicness in the securities markets

    Directional Charge Separation in Isolated Organic Semiconductor Crystalline Nanowires

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    One of the fundamental design paradigms in organic photovoltaic device engineering is based on the idea that charge separation is an extrinsically driven process requiring an interface for exciton fission. This idea has driven an enormous materials science engineering effort focused on construction of domain sizes commensurate with a nominal exciton diffusion length of order 10 nm. Here, we show that polarized optical excitation of isolated pristine crystalline nanowires of a small molecule n-type organic semiconductor, 7,8,15,16-tetraazaterrylene, generates a significant population of charge-separated polaron pairs along the π-stacking direction. Charge separation was signalled by pronounced power-law photoluminescence decay polarized along the same axis. In the transverse direction, we observed exponential decay associated with excitons localized on individual monomers. We propose that this effect derives from an intrinsic directional charge-transfer interaction that can ultimately be programmed by molecular packing geometry

    “In the Beginning, It Was Little Whispers...Now, We’re Almost a Roar”: Conceptualizing a Model for Community and Self in LGBTQ+ Health Information Practices

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    Although LGBTQ+ populations experience significant health challenges, little research exists that investigates their health from an informational perspective. Our study addresses this gap by exploring the health information practices of LGBTQ+ communities in South Carolina, focusing on how sociocultural context shapes these practices. Thirty semi-structured interviews with South Carolina LGBTQ+ community leaders analyzed using open qualitative coding informed the development of a conceptual framework describing their information practices. Findings show that participants engaged in two broad types of practices – protective and defensive – as responses to risks and barriers experienced, which are in turn produced by social and structural factors. Findings advance information practices and marginalization approaches and offer ways for medical professionals to improve service to LGBTQ+ populations

    ENIGMA and global neuroscience: A decade of large-scale studies of the brain in health and disease across more than 40 countries

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    This review summarizes the last decade of work by the ENIGMA (Enhancing NeuroImaging Genetics through Meta Analysis) Consortium, a global alliance of over 1400 scientists across 43 countries, studying the human brain in health and disease. Building on large-scale genetic studies that discovered the first robustly replicated genetic loci associated with brain metrics, ENIGMA has diversified into over 50 working groups (WGs), pooling worldwide data and expertise to answer fundamental questions in neuroscience, psychiatry, neurology, and genetics. Most ENIGMA WGs focus on specific psychiatric and neurological conditions, other WGs study normal variation due to sex and gender differences, or development and aging; still other WGs develop methodological pipelines and tools to facilitate harmonized analyses of "big data" (i.e., genetic and epigenetic data, multimodal MRI, and electroencephalography data). These international efforts have yielded the largest neuroimaging studies to date in schizophrenia, bipolar disorder, major depressive disorder, post-traumatic stress disorder, substance use disorders, obsessive-compulsive disorder, attention-deficit/hyperactivity disorder, autism spectrum disorders, epilepsy, and 22q11.2 deletion syndrome. More recent ENIGMA WGs have formed to study anxiety disorders, suicidal thoughts and behavior, sleep and insomnia, eating disorders, irritability, brain injury, antisocial personality and conduct disorder, and dissociative identity disorder. Here, we summarize the first decade of ENIGMA's activities and ongoing projects, and describe the successes and challenges encountered along the way. We highlight the advantages of collaborative large-scale coordinated data analyses for testing reproducibility and robustness of findings, offering the opportunity to identify brain systems involved in clinical syndromes across diverse samples and associated genetic, environmental, demographic, cognitive, and psychosocial factors

    Mismatches in Scale Between Highly Mobile Marine Megafauna and Marine Protected Areas

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    Marine protected areas (MPAs), particularly large MPAs, are increasing in number and size around the globe in part to facilitate the conservation of marine megafauna under the assumption that large-scale MPAs better align with vagile life histories; however, this alignment is not well established. Using a global tracking dataset from 36 species across five taxa, chosen to reflect the span of home range size in highly mobile marine megafauna, we show most MPAs are too small to encompass complete home ranges of most species. Based on size alone, 40% of existing MPAs could encompass the home ranges of the smallest ranged species, while only \u3c 1% of existing MPAs could encompass those of the largest ranged species. Further, where home ranges and MPAs overlapped in real geographic space, MPAs encompassed \u3c 5% of core areas used by all species. Despite most home ranges of mobile marine megafauna being much larger than existing MPAs, we demonstrate how benefits from MPAs are still likely to accrue by targeting seasonal aggregations and critical life history stages and through other management techniques

    Mismatches in Scale Between Highly Mobile Marine Megafauna and Marine Protected Areas

    Get PDF
    Marine protected areas (MPAs), particularly large MPAs, are increasing in number and size around the globe in part to facilitate the conservation of marine megafauna under the assumption that large-scale MPAs better align with vagile life histories; however, this alignment is not well established. Using a global tracking dataset from 36 species across five taxa, chosen to reflect the span of home range size in highly mobile marine megafauna, we show most MPAs are too small to encompass complete home ranges of most species. Based on size alone, 40% of existing MPAs could encompass the home ranges of the smallest ranged species, while only \u3c 1% of existing MPAs could encompass those of the largest ranged species. Further, where home ranges and MPAs overlapped in real geographic space, MPAs encompassed \u3c 5% of core areas used by all species. Despite most home ranges of mobile marine megafauna being much larger than existing MPAs, we demonstrate how benefits from MPAs are still likely to accrue by targeting seasonal aggregations and critical life history stages and through other management techniques

    Linking Symptom Inventories using Semantic Textual Similarity

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    An extensive library of symptom inventories has been developed over time to measure clinical symptoms, but this variety has led to several long standing issues. Most notably, results drawn from different settings and studies are not comparable, which limits reproducibility. Here, we present an artificial intelligence (AI) approach using semantic textual similarity (STS) to link symptoms and scores across previously incongruous symptom inventories. We tested the ability of four pre-trained STS models to screen thousands of symptom description pairs for related content - a challenging task typically requiring expert panels. Models were tasked to predict symptom severity across four different inventories for 6,607 participants drawn from 16 international data sources. The STS approach achieved 74.8% accuracy across five tasks, outperforming other models tested. This work suggests that incorporating contextual, semantic information can assist expert decision-making processes, yielding gains for both general and disease-specific clinical assessment

    Toward a global and reproducible science for brain imaging in neurotrauma: the ENIGMA adult moderate/severe traumatic brain injury working group

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    Abstract: The global burden of mortality and morbidity caused by traumatic brain injury (TBI) is significant, and the heterogeneity of TBI patients and the relatively small sample sizes of most current neuroimaging studies is a major challenge for scientific advances and clinical translation. The ENIGMA (Enhancing NeuroImaging Genetics through Meta-Analysis) Adult moderate/severe TBI (AMS-TBI) working group aims to be a driving force for new discoveries in AMS-TBI by providing researchers world-wide with an effective framework and platform for large-scale cross-border collaboration and data sharing. Based on the principles of transparency, rigor, reproducibility and collaboration, we will facilitate the development and dissemination of multiscale and big data analysis pipelines for harmonized analyses in AMS-TBI using structural and functional neuroimaging in combination with non-imaging biomarkers, genetics, as well as clinical and behavioral measures. Ultimately, we will offer investigators an unprecedented opportunity to test important hypotheses about recovery and morbidity in AMS-TBI by taking advantage of our robust methods for large-scale neuroimaging data analysis. In this consensus statement we outline the working group’s short-term, intermediate, and long-term goals
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