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排序方式: 共有65条查询结果,搜索用时 15 毫秒
1.
This paper investigates volatility spillover in the Nigerian sovereign bond market arising from oil price shocks, using Vector Autoregressive Moving Average ‐ Asymmetric Generalized Autoregressive Conditional Heteroscedasticity (VARMA‐AGARCH) model. The paper covers the period March 22, 2011 to April 14, 2016 and makes use of the daily data of the Nigerian Sovereign Bond, Brent oil and West Texas Intermediate (WTI), respectively. We endogenously and sequentially detect structural break points using the test of Bai and Perron (2003) framework. In order to accurately estimate the model, we modify it by incorporating the break points into the VARMA‐AGARCH model, a process which if ignored would lead to model misspecification. The results obtained demonstrate a significant cross‐market volatility transmission between oil and sovereign bond market with ample sensitivity to structural breaks. The study also computes optimum weight portfolio and hedge ratio both with and without structural breaks and results equally indicate sensitivity to structural breaks. 相似文献
2.
Poverty, despite being a multifaceted concept, is commonly measured in either absolute or relative monetary terms. However, it can also be measured subjectively, as people form perceptions on their relative income, welfare and life satisfaction. This is the first study that uses the National Income Dynamics Study data to analyse poverty across various objective and subjective methods. The paper finds that while respondents' poverty status varies across methods, blacks remain the racial group most likely to be defined as poor by at least one method. The multivariate analysis reveals that the impact of some explanatory variables, such as experience of negative events, frequency of crime victimisation, health status and importance of religious activities, is mixed across methods. 相似文献
3.
An approach to evaluate the acute impacts from simulated accidental releases of chlorine and ammonia
The manner in which specific chemicals are used is studied in order to identify plausible release scenarios and the probability of their occurrence. 相似文献
4.
Standard theory assumes that voters’ preferences over actions (voting) are induced by their preferences over electoral outcomes (policies, candidates). But voters may also have non-consequentialist (NC) motivations: they may care about how they vote even if it does not affect the outcome. When the likelihood of being pivotal is small, NC motivations can dominate voting behavior. To examine the prevalence of NC motivations, we design an experiment that exogenously varies the probability of being pivotal yet holds constant other features of the decision environment. We find a significant effect, consistent with at least 12.5 percent of subjects being motivated by NC concerns. 相似文献
5.
Pinkie E. Zwane Moses Sithole Lawrance Hunter 《International Journal of Consumer Studies》2010,34(3):265-271
In an attempt to provide a technological solution to the influx of cheap imports in South Africa and bridging the technology divide between Africa and the rest of the world, the Council for Scientific and Industrial Research procured a three‐dimensional body scanner from the Textile and Clothing Technology Corporation, in the US. The pilot study was aimed at introducing the technology to the South African consumers, and to compare the scanned data with the manually taken measurements. A convenience sample of 56 females in South Africa was interviewed using a structured questionnaire. Interviews were used to capture views on acceptance of the technology, prior to being scanned. Scanning garments made from a stretchy fabric were designed and sewn in four sizes of small, medium, large and extra large. A covariance, one sample t‐test and paired t‐ tests were used for data analyses. Almost all respondents felt comfortable with the designed scanning garments and the scanning process. The scanner measurements were generally more numerical in value than the manual measurements for a body part as expected, although the disparity was on the higher side than expected. The discernible difference between means of scanned data and standard values in the currently used sizing charts highlighted the long overdue need to update the sizing charts using a national anthropometric database generated locally. 相似文献
6.
This study identified threats against biodiversity and conservation in Kenya, and their prevalence across protected areas. The susceptibility of protected areas to the threat factors was also assessed. Ten threat factors were identified from information obtained through interviews with protected area officers. The most prevalent threat factors were the bush meat trade, poaching, prevalence of human–wildlife conflicts, human population density and encroachment, and loss of migration corridors and dispersal areas. Most of the protected areas were susceptible to more than half of the threat factors. All marine protected areas, a majority of forested and protected areas popular with tourists were highly susceptible to most of the threat factors. The findings suggest that biodiversity and most of the protected areas in Kenya are currently faced with various threats. Forest ecosystems, marine protected areas and wetlands need urgent and focused conservation strategies to safeguard them and their biodiversity. Tourism is, however, not a major primary threat; paradoxically some of the other threats identified may be a threat to Kenya's tourism industry. 相似文献
7.
8.
Moses Acquaah 《战略管理杂志》2007,28(12):1235-1255
This study replicates and extends previous research focusing on China, to a sub‐Saharan African emerging economy environment. Specifically, the study directly replicates the impact of social capital derived from the micro‐managerial networking relationships and ties with top managers at other firms and government officials on macro‐organizational performance using data from Ghana. This study further extends previous work by examining the impact of social capital derived from managerial social networking relationships and ties with community leaders on organizational performance. It examines how the relationship between social capital and organizational performance is contingent on an organization's competitive strategic orientation. The findings suggest that social capital developed from managerial networking and social relationships with top managers at other firms, government officials (political leaders and bureaucratic officials), and community leadership enhance organizational performance. The findings from the contingency analyses reveal some interesting trends. The impact of social capital on organizational performance differs between firms that pursue the different competitive strategies (low‐cost, differentiation, and combination of low‐cost and differentiation) and those who do not pursue those strategies. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
9.
Moses L. Pava 《Journal of Business Ethics》2007,73(3):287-299
This paper is divided into two sections. In the first section, I discuss “what is spirituality?” and in the section that follows, I examine some of the implications of my definition to the teaching of spirituality in an undergraduate business ethics course. For the purposes of this paper, spirituality is defined as the planned experience (the inner feeling) of blending integrity and integration through 1 – acceptance (of the past), 2 – commitment (to the future), 3 – reasonable choice, 4 – mindful action, and 5 –continuous dialog (both internal and external). This definition is a work-in-progress and offered mainly as a point of departure rather than a final destination. 相似文献
10.
Harrison Hong Ilan Kremer Jeffrey D. Kubik Jianping Mei Michael Moses 《The Rand journal of economics》2015,46(1):186-216
We estimate the effect of ordering by value on revenues in sequential art auctions held by Sotheby's and Christie's. We exploit a pre determined rotation of which of these two houses holds their auction first during auction week in New York City. When the house that goes first has relatively expensive paintings compared to the other house, we find that the sale premium for the week is around 21% higher relative to the mean sale premium, and the fraction of paintings sold during the week is around 11% higher. We provide evidence that this is due to an anchoring effect. 相似文献