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41.
We present evidence that the recent African growth renaissance has reached Africa’s poor. Using survey data on African income distributions and national accounts GDP, we estimate income distributions, poverty rates, and inequality indices for African countries for the period 1990–2011. We show that: (1) African poverty is falling rapidly; (2) the African countries for which good inequality data exists are set to reach the Millennium Development Goal (MDG) poverty target on time. The entire continent except for the Democratic Republic of Congo (DRC) will reach the MDG in 2014, one year in advance, and adding the DRC will delay the MDG until 2018; (3) the growth spurt that began in 1995, if anything, decreased African income inequality instead of increasing it; (4) African poverty reduction is remarkably general: it cannot be explained by a large country, or even by a single set of countries possessing some beneficial geographical or historical characteristic. All classes of countries, including those with disadvantageous geography and history, experience reductions in poverty. In particular, poverty fell for both landlocked as well as coastal countries; for mineral-rich as well as mineral-poor countries; for countries with favorable or with unfavorable agriculture; for countries regardless of colonial origin; and for countries with below- or above-median slave exports per capita during the African slave trade. 相似文献
42.
This paper investigates whether the net benefits from owning a vehicle, proxied by annual miles driven, explain the price declines observed over a vehicle's life. We first model the household decision on how much to drive each of its vehicles. Then we empirically establish that variation in household annual miles across brands explains observed price declines. Furthermore, the effect of vehicle age on annual miles decisions (and consequently on market value) depends on household characteristics and the composition of the vehicle stock owned. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
43.
An analysis of risks for biodiversity under the DPSIR framework 总被引:5,自引:2,他引:3
44.
Interindustry merger patterns and resource dependence: a replication and extension of Pfeffer (1972)
Sydney Finkelstein 《战略管理杂志》1997,18(10):787-810
This paper reexamines Pfeffer’s (1972) classic study on interindustry merger patterns by replicating and then extending his findings. Pfeffer argued and found that resource dependencies, as measured by interindustry economic transactions, explained merger patterns. The replication investigates how robust the resource dependence explanation for interindustry mergers is when more precise methods are applied to a data set that essentially recreates Pfeffer’s. The extension examines the strength of the resouce dependence effect over time, and offers hypotheses that seek to explain both longitudinal and cross-sectional variation in the strength of this effect. Results indicate that while the significance of the resource dependence effect is once again observed, after applying more refined analytical methods to the data the explanatory power of resource dependence is greatly diminished. In addition, variation in the strength of the resource dependence effect suggests some boundary conditions for the theory, at least with respect to its ability to predict interindustry mergers. © 1997 John Wiley & Sons, Ltd. 相似文献
45.
Dimitri Kroujiline Maxim Gusev Dmitry Ushanov Sergey V. Sharov Boris Govorkov 《Quantitative Finance》2016,16(11):1695-1712
In this paper, we seek to demonstrate the predictability of stock market returns and explain the nature of this return predictability. To this end, we introduce investors with different investment horizons into the news-driven, analytic, agent-based market model developed in Gusev et al. [Algo. Finance, 2015, 4, 5–51]. This heterogeneous framework enables us to capture dynamics at multiple timescales, expanding the model’s applications and improving precision. We study the heterogeneous model theoretically and empirically to highlight essential mechanisms underlying certain market behaviours, such as transitions between bull and bear markets and the self-similar behaviour of price changes. Most importantly, we apply this model to show that the stock market is nearly efficient on intraday timescales, adjusting quickly to incoming news, but becomes inefficient on longer timescales, where news may have a long-lasting nonlinear impact on dynamics, attributable to a feedback mechanism acting over these horizons. Then, using the model, we design algorithmic strategies that utilize news flow, quantified and measured, as the only input to trade on market return forecasts over multiple horizons, from days to months. The backtested results suggest that the return is predictable to the extent that successful trading strategies can be constructed to harness this predictability. 相似文献
46.
Alexander Dix Gregor Thüsing Johannes Traut Laurits Christensen Federico Etro Susan Ariel Aaronson Rob Maxim 《Intereconomics》2013,48(5):268-285
Last year, the European Commission proposed a comprehensive reform of the EU’s data protection rules. The proposed regulation has been surrounded by fi erce controversy and has been the subject of frenzied lobbying by global corporations, industry groups, research centres and privacy campaigners on both sides of the Atlantic. This Forum applies cool economic reasoning to this heated issue. What are the potential economic benefi ts of EU harmonisation? Will the proposed regulation negatively impact the competitiveness and innovation of European fi rms in the global marketplace? Or could it jeopardise attempts to protect privacy as a fundamental right in civil societies? 相似文献
47.
We develop a framework for computing the total valuation adjustment (XVA) of a European claim accounting for funding costs, counterparty credit risk, and collateralization. Based on no‐arbitrage arguments, we derive backward stochastic differential equations associated with the replicating portfolios of long and short positions in the claim. This leads to the definition of buyer's and seller's XVA, which in turn identify a no‐arbitrage interval. In the case that borrowing and lending rates coincide, we provide a fully explicit expression for the unique XVA, expressed as a percentage of the price of the traded claim, and for the corresponding replication strategies. In the general case of asymmetric funding, repo, and collateral rates, we study the semilinear partial differential equations characterizing buyer's and seller's XVA and show the existence of a unique classical solution to it. To illustrate our results, we conduct a numerical study demonstrating how funding costs, repo rates, and counterparty risk contribute to determine the total valuation adjustment. 相似文献
48.
We find optimal trading policies for long‐term investors with constant relative risk aversion and constant investment opportunities, which include one safe asset, liquid risky assets, and an illiquid risky asset trading with proportional costs. Access to liquid assets creates a diversification motive, which reduces illiquid trading, and a hedging motive, which both reduces illiquid trading and increases liquid trading. A further tempering effect depresses the liquid asset's weight when the illiquid asset's weight is close to ideal, to keep it near that level by reducing its volatility. Multiple liquid assets lead to portfolio separation in four funds: the safe asset, the myopic portfolio, the illiquid asset, and its hedging portfolio. 相似文献
49.
The study investigates how local actors pursue two paradoxical aspects of legitimacy in a global institutional framework: the need for global conformity and the need for local distinctiveness. Drawing on the notion of glocalization, it explicates how this pursuit is accomplished by actors' selective fidelity to global norms and adaptation of these norms to local conditions. The empirical work consists of a five‐year qualitative case study of the Ontario wine industry. It provides empirical evidence for the presence of several non‐mutually exclusive paths through which local actors seek legitimation in a global context. The study offers important implications for future research on legitimation and globalization. 相似文献
50.