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21.
Philipp Otto 《统计学通讯:模拟与计算》2017,46(6):4547-4558
In applications of spatial statistics, it is necessary to compute the product of some matrix W of spatial weights and a vector y of observations. The weighting matrix often needs to be adapted to the specific problems, such that the computation of Wy cannot necessarily be done with available R-packages. Hence, this article suggests one possibility treating such issues. The proposed technique avoids the computation of the matrix product by calculating each entry of Wy separately. Initially, a specific spatial autoregressive process is introduced. The performance of the proposed program is briefly compared to a basic program using the matrix multiplication. 相似文献
22.
I employ a classification of headlines from newspapers and wire services to examine whether stale macroeconomic news affects stock prices. Unlike with individual stocks, the cost of obtaining information about major economic releases is relatively low. Thus, stock prices should adjust to economic news announcements prior to their coverage in newspapers. I find statistically and economically significant relationship between stale news stories on unemployment and next week’s S&P 500 returns. This effect is then completely reversed during the following week. These findings show that investors are affected by salient information and support the hypothesis that investors overreact to stale macroeconomic news reported in newspapers. 相似文献
23.
Michael Parkinson 《Journal of applied statistics》2013,40(3):465-482
The analysis of data using a stable probability distribution with tail parameter α<2 (sometimes called a Pareto–Levy distribution) seems to have been avoided in the past in part because of the lack of a significance test for the mean, even though it appears to be the correct distribution to use for describing returns in the financial markets. A z test for the significance of the mean of a stable distribution with tail parameter 1<α≤2 is defined. Tables are calculated and displayed for the 5% and 1% significance levels for a range of tail and skew parameters α and β. Through the use of maximum likelihood estimates, the test becomes a practical tool even when α and β are not that accurately determined. As an example, the z test is applied to the daily closing prices for the Dow Jones Industrial average from 2 January 1940 to 19 March 2010. 相似文献
24.
Shirin Rai 《International Feminist Journal of Politics》2013,15(4):579-601
In this article I map out the major debates on global governance and the feminist critiques of the mainstream interventions in these debates. I argue that the shift from government to governance is a response to the needs of a gendered global capitalist economy and is shaped by struggles, both discursive and material, against the unfolding consequences of globalization. I suggest feminist interrogations of the concept, processes, practices and mechanisms of governance and the insights that develop from them should be centrally incorporated into critical revisionist and radical discourses of and against the concept of global governance. However, I also examine the challenges that the concept of global governance poses for feminist political practice, which are both of scholarship and of activism as feminists struggle to address the possibilities and politics of alternatives to the current regimes of governance. I conclude by suggesting that feminist political practice needs to focus on the politics of redistribution in the context of global governance. 相似文献
25.
Due to their common role as suppliers, small and medium-sized enterprises (SMEs) are especially challenged by today's turbulent business conditions. In order to meet this challenge, short-term WWW-based enterprise cooperations are regarded as an appropriate way to enhance the competitive strength of SMEs. Hence, the Institute of Machine Tools and Industrial Management (IWB) operates three so-called competence networks for engineering (www.engineering-net.de), rapid prototyping (www.rp-net.de) and manufacturing (www.produktionsnetz.de) services. For the purpose of an applied research project, more than 80 participating SME suppliers have been included in these specialized virtual markets, which are based on the core competencies of the cooperating SMEs. Additionally, the platform (www.virtueller-markt.de) enables customers to configure their specific supply chains via the above-mentioned competence networks. The presented paper depicts how to establish and operate these competence networks as well as how to configure supply chains via these virtual markets. 相似文献
26.
Appa Rao Korukonda 《International Journal of Value-Based Management》1999,12(1):51-67
The world economy today is swept by unprecedented rates of change, complexity, interconnectedness, and uncertainty. For the first time since the 1930s, issues of the international economy and financial markets are playing a pivotal role in discussions of foreign and domestic policy. However, even as the revolutionary trends in the international economy and in world finance are in the offing, it is important to realize that the problems of mankind are primarily economic and social, not financial or political. While the trends towards liberalization of economic policies and integration of financial markets might seem to point toward the ultimate triumph of the magic of the market and free enterprise, a little reflection will reveal a number of undercurrents, dilemmas, and difficult choices waiting to be resolved. This article identifies the structural and human dimensions of these challenges in the form of thirteen Policy Imperatives aimed at the creation of modified versions of financial markets to make them more humane and less vulnerable to failure. 相似文献
27.
Susan Long 《Human Relations》1999,52(6):723-743
This paper argues that an organizationaldiscourse on consumerism is replacing a prior discourseof dependency. This discourse encourages, and isencouraged by, economic rationales for behavior and ismarked by the collapse of many complex societal rolesinto the simpler category of customer.Moreover, practices emergent from consumerism andeconomic rationalism often act as organizational andsocial defences against anxieties about theuncertainties and changes occurring in a worldincreasingly dominated by global markets where thecustomer is sovereign. Six workinghypotheses are proposed to explain the operation of these new socialdefences. Evidence in support of these hypotheses comesfrom collaborative action research projects in which theauthor is involved. The argument moves toward a consideration of the new consumerprovider pair which, it is proposed, has becomea major signifier within the consumer discourse andwhich might be considered as a transitional pair indealing with widespread organizationalchange. 相似文献
28.
金融发展理论在90年代的发展 总被引:10,自引:0,他引:10
谈儒勇 《中国人民大学学报》2000,(2)
90年代金融发展理论突破了麦金农—肖的框架,并融合了内生增长理论的一些积极因素。90年代金融发展理论家建立了大量的理论模型,旨在阐释金融体系是如何内生形成和发展的以及金融体系是如何作用于经济增长的,并在此基础上,提出了一系列有关金融发展的政策主张。 相似文献
29.
Knut Anton Mork 《商业与经济统计学杂志》2013,31(2):165-175
Revisions of the early GNP estimates may contain elements of measurement errors as well as forecast errors. These types of error behave differently but need to satisfy a common set of criteria for well-behavedness. This article tests these criteria for U.S. GNP revisions. The tests are similar to tests of rationality and are based on the generalized method of moments estimator. The flash, 15-day, and 45-day estimates are found to be ill behaved, but the 75-day estimate satisfies the criteria for well-behavedness. 相似文献
30.
《商业与经济统计学杂志》2013,31(4):570-576
This note compares a Bayesian Markov chain Monte Carlo approach implemented by Watanabe with a maximum likelihood ML approach based on an efficient importance sampling procedure to estimate dynamic bivariate mixture models. In these models, stock price volatility and trading volume are jointly directed by the unobservable number of price-relevant information arrivals, which is specified as a serially correlated random variable. It is shown that the efficient importance sampling technique is extremely accurate and that it produces results that differ significantly from those reported by Watanabe. 相似文献