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Austin Drenski Ross Hallren 《The journal of international trade & economic development》2013,22(7):829-842
ABSTRACTWe find evidence of pervasive tariff evasion in the global data on trade from 1988 to 2015. Using over 35 million observations of data on import and export flows at the HS6 product category level, we find evidence of substantial underreporting of imports relative to export data on average and particularly when tariffs on product categories are high. These effects are stronger in more corrupt destination countries, as measured by the World Bank's Worldwide Governance Indicators [World Bank. 2016. Worldwide Governance Indicators. September 25, 2016]. In addition, evidence of tariff evasion increases significantly in economic downturns. We document these patterns in the global data and explore the welfare effects of this evasion by (1) putting a lower bound on the extent to which there are revenue losses from tariff evasion, and by (2) estimating the effects of corruption as measured by this indicator on global trade in a simple gravity model. We estimate that in total, revenue losses from tariff evasion are currently likely to exceed 400 to 670 million USD globally per year, and find that the effects of corruption on trade flows are ambiguous overall but change from weakly positive (‘grease the wheels’) to largely negative over the years in our sample. 相似文献
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As the energy grid moves further toward renewable sources to generate the world's power requirements, energy storage becomes increasingly critical to infrastructure. Lithium-ion batteries are an attractive option for such storage, with an energy density and cycling characteristics that provide advantages over other technologies. However, Li-ion batteries also have several unique safety concerns due to the potential for thermal runaway, a self-heating reaction, which can result in venting of both flammable and toxic gases and fire. This article explores the hazards associated with thermal runaways and discusses design considerations and requirements for systems intended to mitigate risk associated with such events. 相似文献
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Since its original development by Sharpe (1964), the Capital Asset Pricing Model (CAPM) has been the focus of great interest, practical usage, modifications, testing, and controversy. The basic hypothesis of the CAPM is that the minimum expected return required by investors on any asset will equal the risk-free rate plus a premium for the asset's contribution to the variance risk of a diversified portfolio as measured by the asset's beta. The model is often utilized by investors to calculate the relevant risk and required return on an asset, while corporate officers widely employ the theory to compute the appropriate discount rate to use in estimating the net present value of capital budgeting projects when evaluating spending decisions (Gitman and Mercurio, 1982). 相似文献
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J. Austin Murphy 《The Journal of Financial Research》1990,13(3):233-241
In this paper a model of asset pricing is derived that relaxes the restrictive assumptions of standard theories. The model leads to a tractable capital asset pricing model framework that can be used to test empirical hypotheses and draw important insights on capital market equilibrium. 相似文献
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J. Austin Murphy 《期货市场杂志》1991,11(4):491-503
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This study demonstrates that in contrast to prior research findings on short-term stock returns, long-term stock returns are positively correlated with inflation. In addition, within the context of a more complete explanatory model, long-term stock returns are found to be negatively related to changes in long-term interest rates and negatively related to beginning price to earnings ratios. The significance of these variables in explaining almost all the time series variation in long-term stock returns demonstrates that changes in stock values are well explained by theory. 相似文献
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The article presents an algorithm for linear regression computations subject to linear parametric equality constraints, linear parametric inequality constraints, or a mixture of the two. No rank conditions are imposed on the regression specification or the constraint specification. The algorithm requires a full Moore-Penrose g-inverse which entails extra computational effort relative to other orthonormalization type algorithms. In exchange, auxiliary statistical information is generated: feasibility of a set of constraints may be checked, estimability of a linear parametric function may be checked, and bias and variance may be decomposed by source. 相似文献