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Jessica Laureano Phillips Tiffany L. Overton Mackenzie Campbell-Furtick Kaley Simon Therese M. Duane Rajesh G. Gandhi 《International journal of injury control and safety promotion》2017,24(4):452-458
Several US states repealed universal motorcycle helmet laws in the 1990s and 2000s. The purpose of this study was to examine national trends in helmet use among adult trauma patients with motorcycle-related injuries. We hypothesized that motorcycle helmet use declined over time. We retrospectively analyzed the National Trauma Data Bank's National Sample Program for 2003–2010. We also obtained data on US motorcycle fatalities reported in the Fatality Analysis Reporting System and population data from the U.S. Census Bureau to calculate motorcycle-related fatality rates over time. A total of 255,914 patients met inclusion criteria, of whom 148,524 (58%) were helmeted. During the study period, helmet use increased from 56% in 2003 to 60% in 2010 (p < 0.001). However, motorcycle-related fatality rates also increased in states with and without universal helmet laws. Nationally, rates of helmet use have increased. However, fatalities due to motorcycle crashes have also increased during the same period. 相似文献
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This paper explores the political economy of energy transition in South Africa. An economic model based around a powerful ‘minerals-energy complex’ that has previously been able to provide domestic and foreign capital with cheap and plentiful coal-generated electricity is no longer economically or environmentally sustainable. The paper analyses the struggle over competing energy visions, infrastructures and political agendas in order to generate insights into the governance and financing of clean energy transitions in South Africa. It provides both a rich empirical account of key policy developments aimed at enabling such a transition and provides reflections on how best to theorise the contested politics of energy transitions. 相似文献
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The paper proposes a novel inference procedure for long-horizon predictive regression with persistent regressors, allowing the autoregressive roots to lie in a wide vicinity of unity. The invalidity of conventional tests when regressors are persistent has led to a large literature dealing with inference in predictive regressions with local to unity regressors. Magdalinos and Phillips (2009b) recently developed a new framework of extended IV procedures (IVX) that enables robust chi-square testing for a wider class of persistent regressors. We extend this robust procedure to an even wider parameter space in the vicinity of unity and apply the methods to long-horizon predictive regression. Existing methods in this model, which rely on simulated critical values by inverting tests under local to unity conditions, cannot be easily extended beyond the scalar regressor case or to wider autoregressive parametrizations. In contrast, the methods developed here lead to standard chi-square tests, allow for multivariate regressors, and include predictive processes whose roots may lie in a wide vicinity of unity. As such they have many potential applications in predictive regression. In addition to asymptotics under the null hypothesis of no predictability, the paper investigates validity under the alternative, showing how balance in the regression may be achieved through the use of localizing coefficients and developing local asymptotic power properties under such alternatives. These results help to explain some of the empirical difficulties that have been encountered in establishing predictability of stock returns. 相似文献
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P.A. Phillips 《The Service Industries Journal》2013,33(6):731-746
Over the past decade, the literature has seen a proliferation in articles relating to the balanced scorecard, which has been motivated by managers' needs to develop a more balanced view of performance measurement. Despite global adoption by organisations in the private and public sector, the question of how the balanced scorecard could be used as a strategic control tool has rarely been directly discussed. Academic research has tended to have a strong predilection for studies assessing the balanced scorecard as a control tool utilising metrics to report various achievements of targets. A longitudinal case study approach is used over a three year period, which seeks to deepen understanding about the theoretical and practical aspects of the balanced scorecard as a strategic control tool. It is anticipated that this would illuminate the way in which the balanced scorecard has intertwined in the fabric of organisational life and how it positions itself in the wider social context in which it was embedded. The findings of the case study reveal that over-reliance on the successful achievement of balanced scorecard metrics without a focus on strategic control could lead to an organisation having to pursue an exit strategy for a profitable product. 相似文献
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Stephen Brown Chris Hackley Shelby D. Hunt Charles Marsh Nicholas O’Shaughnessy Barbara J. Phillips 《Journal of Marketing Management》2013,29(15-16):1336-1378
ABSTRACTIn this collection of short, invited essays on the topic of marketing (as) rhetoric we deal with a variety of issues that demonstrate the centrality of rhetoric and rhetorical considerations to the pursuit of marketing scholarship, research and practice. Stephen Brown examines the enduring rhetorical power of the 4Ps; Chris Hackley argues for the critical power of rhetorical orientations in marketing scholarship but cautions us on the need to work harder in conceptually connecting rhetorical theory and modern marketing frameworks; Shelby Hunt explains how rhetorical processes are incorporated in his inductive realist model of theory generation, using one of his most successful publications as an illustration; Charles Marsh demonstrates what Isocrates’ broad rhetorical project has to teach us about the importance of reputation cultivation in modern marketing; Nicholas O’Shaughnessy uses an analysis of Trump’s discourse to argue that political marketing as it is currently conceived is ill-equipped to engage effectively with the rhetorical force of Trump’s ‘unmarketing’; Barbara Phillips uses Vygotsky’s work on imagination to investigate the important of pleasure and play in advertising rhetoric; and finally, David Tonks, who in many ways started it all, reiterates the need for marketers to recognise the strength of the relationship between marketing and persuasion. 相似文献