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71.
New, techniques of international patent anabsis are illustrated and resultsfrom preliminary validity tests of these techniques are presented. Indicators of technological activity, technological significance and commercial potential are constructed, and used to analyze fiber-based opto-electronic couplers and monoclonal-antibody-based diagnostic kits at the levels o f the technology, nation and firm. The international patent indicators are found to be closely correlated with R&D expenditures, scientific publications and new product introductions. They also relate to these indicators in ways that moke sense as specified in simple regression models of the innovation process. Comparisons of patent analysis results with expert opinion (for two process technologies) reveal that technology–level analyzes conform quite well with expert opinion, but national – and firm–level analyes vary from a low to a modest correlation with expert opinion. The authors conclude that the techniques can provide important information for corporate technology management, but that studies of additional technologies and further validity tests are needed. 相似文献
72.
Tom Fischer 《Mathematical Finance》2014,24(1):97-124
We generalize Merton’s asset valuation approach to systems of multiple financial firms where cross‐ownership of equities and liabilities is present. The liabilities, which may include debts and derivatives, can be of differing seniority. We derive equations for the prices of equities and recovery claims under no‐arbitrage. An existence result and a uniqueness result are proven. Examples and an algorithm for the simultaneous calculation of all no‐arbitrage prices are provided. A result on capital structure irrelevance for groups of firms regarding externally held claims is discussed, as well as financial leverage and systemic risk caused by cross‐ownership. 相似文献
73.
This paper focuses on potential reasons for variations in benefit packages, in particular variations in the availability of retirement health insurance and leave. An important feature of our analysis is that we do not start with heterogeneity in workforces to explain fringe benefit differences across employers. It would be straightforward to say that differences across employers in fringe benefit packages simply represent differences in the preferences of their workforces. Rather, we focus on heterogeneity across employers as an important source of differences in fringe benefit packages. Preliminary evidence is found supportive of the predicted differences in the likelihood of such fringe benefits as retirement health insurance and leave based upon two variables–the extent of on-the-job training offered by the employer and the size of the employers. We also examine the implied links between these fringe benefits and such variables as average tenture and the proportion of the workforce that is female. 相似文献
74.
Human-mediated seed dispersal is recognised as an important, but under-researched, issue. To assess the potential for tourists to act as unintentional seed dispersal agents, we reviewed published and unpublished data on seed dispersal via clothing, vehicles (cars) and in/on horses and donkeys, all of which can be used by tourists. Seeds from 754 species of terrestrial plants have been collected from these vectors, 15% of which are internationally recognised environmental weeds. Seeds were collected from personal clothing and equipment (228 species), the fur of donkeys and horses (42 species), horse dung (216 species) and vehicles (505 species). Most were herbs (429 species) or graminoids (237 species) and native to Europe. Annual Poa, White Clover, Kentucky Bluegrass and Yorkshire Fog were the most frequent species. There have been eight studies specifically on tourists, which identified 12 species on clothing, 26 on vehicles and 133 from horse dung. Methods that minimise the risk of tourists as human-mediated dispersal agents may therefore be appropriate for some tourism activities/destinations: suggestions are made. Further sampling using standardised experimental techniques is required to assess the relative risk associated with specific tourist activities and locations and determine which, and how much, seed is transported. 相似文献
75.
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77.
Mary James R. Fisher Katie E. Misener 《Leisure Sciences: An Interdisciplinary Journal》2013,35(6):477-493
ABSTRACTThose within the fitness industry claim that gyms provide accessible space for women (of certain economic status) to engage in activities that will increase their health. As such, gyms are marketed as safe, inclusive, and empowering spaces. Yet when viewing gym spaces through a feminist-informed lens, it becomes clear that gyms are not always innocuous spaces. They often reflect and perpetuate gendered power relations and highly prescribed cultural expectations for femininity around women's bodies, appearances, strength, and abilities. This narrative inquiry sought to illuminate women's gendered experiences within a for-profit mixed-gendered gym space. Through the use of unstructured life story interviews, this research highlights the dominant gendered expectations that women perceived within the gym and how these expectations influence women's gym use. The narratives also exposed several ways that gyms can be changed in order to facilitate more positive gym experiences for women. 相似文献
78.
Heidi J. Albers Carolyn Fischer James N. Sanchirico 《Resource and Energy Economics》2010,32(4):483-499
The spread of invasive species (IS) is an inherently spatial process, and management of invasive species occurs over spatially heterogeneous regions, but policy constraints can restrict management responses to be homogeneous across regions. Using a spatial bioeconomic model that includes a representation of invasive species ecology based on heterogeneous environments that are linked across space and time by human and ecological pathways, we compare optimal spatially heterogeneous policy to spatially uniform policy. We explore the magnitude and pattern of the policy differences with emphasis on the influence of different types of underlying heterogeneity across locations. 相似文献
79.
J. L. Hemingway Mary Green Wood Parr 《Leisure Sciences: An Interdisciplinary Journal》2013,35(3):139-162
The leisure research?leisure practice relation remains uncertain. Assuming leisure provides a preexisting link is not supported by research. Leisure research and leisure practice are independent professional paradigms between which a relation must be constructed. Three perspectives on constructing the research?practice relation are examined in this article: the traditional, the personal, and the critical. The benefits approach to leisure is a test case in each perspective. The traditional and personal perspectives subordinate one professional paradigm to the other or intensify their separation. The benefits approach fails to resolve these difficulties. The critical perspective emphasizes developmental activity and emancipation, facilitates research?practice interaction, and maintains the professional paradigms' integrity, and it reveals shortcomings in the benefits approach. The critical perspective enables the most dynamic research?practice relation. 相似文献
80.
Mary E. Huneke 《心理学和销售学》2005,22(7):527-550
The practice of voluntary simplicity is inextricably linked to consumer behavior and has attracted the attention of researchers in a number of disciplines, including psychology and marketing. Yet the daily practice of voluntary simplicity in the United States remains largely unexamined. The research presented here is the first to look at voluntary simplicity with the use of a nationwide sample of American consumers. A more refined application of Maslow's theory of human motivation to the understanding of this social phenomenon is proposed. The practices considered most important to this lifestyle are identified, as are key impediments to its consistent practice. Factor analysis is used to identify the underlying dimensions of U.S. voluntary simplicity: ecological and social responsibility; community; and maintaining a spiritual life. Findings indicate that people of moderate income are more likely to practice voluntary simplicity than was previously believed. This research also compares highly committed simplifiers to those who are less committed, finding that more committed practitioners are more likely to be consistent in practices requiring ongoing effort, such as composting. © 2005 Wiley Periodicals, Inc. 相似文献