3,964 research outputs found

    Electroweakino constraints from LHC data

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    We investigate the sensitivity of existing LHC searches to the charginos and neutralinos of the MSSM when all the other superpartners are decoupled. In this limit, the underlying parameter space reduces to a simple four-dimensional set {M1,M2,μ,tanβ}\{M_1,\,M_2,\,\mu,\,\tan\beta\}. We examine the constraints placed on this parameter space by a broad range of LHC searches taking into account the full set of relevant production and decay channels. We find that the exclusions implied by these searches exceed existing limits from LEP only for smaller values of the Bino mass M1150M_1 \lesssim 150 GeV. Our results have implications for MSSM dark matter and electroweak baryogenesis.Comment: 30 pages, 15 figure

    Mice Hemizygous for a Pathogenic Mitofusin-2 Allele Exhibit Hind Limb/Foot Gait Deficits and Phenotypic Perturbations in Nerve and Muscle.

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    Charcot-Marie-Tooth disease type 2A (CMT2A), the most common axonal form of hereditary sensory motor neuropathy, is caused by mutations of mitofusin-2 (MFN2). Mitofusin-2 is a GTPase required for fusion of mitochondrial outer membranes, repair of damaged mitochondria, efficient mitochondrial energetics, regulation of mitochondrial-endoplasmic reticulum calcium coupling and axonal transport of mitochondria. We knocked T105M MFN2 preceded by a loxP-flanked STOP sequence into the mouse Rosa26 locus to permit cell type-specific expression of this pathogenic allele. Crossing these mice with nestin-Cre transgenic mice elicited T105M MFN2 expression in neuroectoderm, and resulted in diminished numbers of mitochondria in peripheral nerve axons, an alteration in skeletal muscle fiber type distribution, and a gait abnormality

    Exports and Externalities: the other side of trade and ecological risk and Technology Diffusion in a Competitive World

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    This paper develops a general equilibrium model to measure welfare effects of taxes for correcting environmental externalities caused by domestic trade, focusing on exter- nalities that arise through exports. Externalities from exports come from a number of sources. Domestically owned ships, planes, and automobiles can become contaminated while visiting other regions and bring unwanted pests home, and species can be in- troduced by contaminated visitors that enter a region to consume goods and services. The paper combines insights from the public finance literature on corrective environ- mental taxes and trade literature on domestically provided services. We find that past methods for measuring welfare effects are inadequate for a wide range of externalities and show the most widely used corrective mechanism, taxes on the sector imposing the environmental externality, may often do more harm than good. The motivation for this paper is the expansion of invasive species' ranges within the United States. We apply our analytical model to the specifc example of quagga and zebra mussel (Dreissena polymorpha and Dreissena rostiformis bugenis) invasion into the U.S Pacific Northwest.environmental regulation, tax interactions, invasive species, environment and trade

    The Intersection of History and Trade: Essays in Trade and Trade Policy

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    In this research I examine the effects that past institutions have on current day economics. In chapters one and two I focus on empirically measuring the impact of past historical trade institutions on current day trade flows. In chapter three I turn my focus to understanding how implicit institutions impact the economic discipline. My first chapter begins with examining the historical legacy of trading institutions of membership in the ex-Soviet Union and Comecon on current day Russia\u27s bilateral trade flows. The use of long-term data from 1998 to 2016 allows for examination of changes in the legacy effects over time, finding that overall historical patterns developed by these institutions remain highly significant 26 years after the collapse of the Soviet Union. Specifically finding that historical borders exert a positive, significant, but decaying impact on current day trade. Historical trading blocs also exhibit a similar pattern but are weaker and not as statistically significant. This chapter provides the first estimates of the legacy left by past institutions with an institutional legacy decay measure. Chapter two I continue my focus on the historical institutions of ex-USSR and Comecon membership on bilateral trade flows to and from Russia. This paper is the first of its kind to examine how the components of Intra-Industry Trade (IIT) are impacted by historical trading institutions in the years of 1996 to 2018. In understanding the long reaching effects of the historical USSR border and Comecon trading bloc, this paper finds that all components of IIT are positively impacted by the historical trading institutions. Interestingly only Vertical Intra-Industry Trade (VIIT) shows signs of the impact of these institutions decaying in a monotonic fashion, while Horizontal Intra-Industry Trade (HIIT) indicates that the effect of historical institutions is much longer. In chapter three I try to understand an important institution within the discipline of economics. Specifically, I focus on understanding how, given a specific set of assumptions about the market and market actors, the discipline advocates for a policy of free trade. The advocacy of free trade was not always as dominant especially during the first American Progressive Movement (1890-1918). Economists who led the movement (i.e. the Economic Progressives) reconstructed society in their image of a technocrat ran state. In their view laissez-faire, and ultimately free trade as an expression of laissez-faire, was the antithesis of the new economic order they created. In spite of all their success, the Economic Progressives were unable to banish free trade from economic theory. I argue this failure was a function of a contradiction in their core research philosophies as well as their inherent philosophical bias. These biases and contradictions, when contrasted with other schools of thought, made the Economic Progressives movement seem less attractive and potentially led to its downfall

    Contextualizing LGBTQ Faculty Experiences: An Account Of Sexual Minority Perceptions

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    The well-being of faculty is susceptible to influence from intrinsic and extrinsic occupational characteristics. Heterosexism or hostile environments can be associated with decreased satisfaction amongst sexual minorities. As such, this transcendental phenomenology examined perceptions from tenured lesbian, gay, bisexual, transgender and queer (LGBTQ) faculty of their workplace conditions. Eight participants reflected on experiences from within higher education, academic settings. This study purposefully probed how sexual orientation and sexual minority status impacted their overall job satisfaction. Through providing context for social interactions in a traditionally heteronormative environment, cultural and attributional behaviors associated with affecting LGBTQ faculty in higher education was analyzed. This phenomenology was guided by two research questions: (1) How do lesbian, gay, bisexual, transgender or queer (LGBTQ) tenured university faculty perceive workplace climate including direct and indirect experiences? (2) How does sexual orientation and identity in higher education settings affect LGBTQ tenured university faculty members’ job satisfaction i.e. self-expression, acceptance, achievement, advancement, retention, and job security? Data collected was analyzed both manually and with NVivo for Mac qualitative software. Each question added to the existing knowledge base by investigating whether sexual minority status in association with occupational surroundings and cultural practices developed perceptions of affective work related outcomes. Following exhaustive data analysis, four themes emerged: (1) sexuality is complicated; (2) inclusion does not equal acceptance; (3) environmental dynamics are integral; and (4) satisfaction reflects participation. Pivotal excerpts were reviewed and presented in the results section of this study documenting the unique experiences of LGBTQ tenured faculty. LGBTQ faculty participants perceived their experiences in academia similar to other marginalized groups. As in minority stress theory, the internalization of pervasive attitudes and beliefs throughout the course of common social exchanges was particularly impactful. Therefore, developing an identity as academic faculty was multifaceted and transcended simply stating one’s sexual orientation. To exist within campus climate required the dexterity to possess levels of awareness and activism that adapt with or resist even the subtlest forms of homophobia and intolerance. If unsuccessful or combined with apathy from administrators or colleagues, parity for LGBTQ faculty was imperiled

    What’s the Difference? Wage Differentials and the Donative-Labor Hypothesis in Non-Profit Firms

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    There are three objectives in this paper. First is to show the existence of wage differentials. The second objective is to investigate the reasons why individuals would take lower wages at a non-profit and try to show that these reasons exist empirically. Thirdly, to prove or disprove the postulate that the donative labor hypothesis is not as important as other factors when explaining wage differentials. To facilitate achieving these goals, this paper will begin by laying out the economic theory behind wages. Then it will move to looking at the current research on the topic of wage differentials, which will be followed by an econometric model. Lastly, to conclude there will be a discussion of the results
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