首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   14004篇
  免费   366篇
财政金融   2541篇
工业经济   1163篇
计划管理   2375篇
经济学   3294篇
综合类   177篇
运输经济   86篇
旅游经济   210篇
贸易经济   2114篇
农业经济   614篇
经济概况   1740篇
邮电经济   56篇
  2021年   75篇
  2020年   150篇
  2019年   244篇
  2018年   269篇
  2017年   311篇
  2016年   283篇
  2015年   165篇
  2014年   304篇
  2013年   1430篇
  2012年   375篇
  2011年   421篇
  2010年   329篇
  2009年   459篇
  2008年   378篇
  2007年   328篇
  2006年   312篇
  2005年   314篇
  2004年   271篇
  2003年   323篇
  2002年   280篇
  2001年   263篇
  2000年   277篇
  1999年   285篇
  1998年   249篇
  1997年   276篇
  1996年   271篇
  1995年   209篇
  1994年   219篇
  1993年   243篇
  1992年   261篇
  1991年   233篇
  1990年   234篇
  1989年   210篇
  1988年   207篇
  1987年   201篇
  1986年   220篇
  1985年   272篇
  1984年   238篇
  1983年   228篇
  1982年   220篇
  1981年   220篇
  1980年   204篇
  1979年   223篇
  1978年   174篇
  1977年   168篇
  1976年   139篇
  1975年   122篇
  1974年   115篇
  1973年   116篇
  1972年   85篇
排序方式: 共有10000条查询结果,搜索用时 415 毫秒
101.
The theory articulated in this paper suggests that the desire to reduce demand and competitive uncertainty are two separate, important motives for alliance formation. Taking this as a starting point, we predict the configuration of horizontal alliances that we might expect to observe within an industry when firms experience these uncertainties to different degrees. An empirical test of this theory using data from the global auto industry yields results consistent with the view (1) that alliances are a device for reducing both the uncertainties that arise from unpredictable demand conditions and those that arise from competitive interdependence, and (2) that variation of demand uncertainty and competitive uncertainty across firms explains differentials in both the intensity and structure of their horizontal alliance activity.  相似文献   
102.
The degree of spatial market integration in European Community agricultural product markets is investigated. The methodology is based on co-integration analysis. A two-step testing procedure is applied to test the existence of the ‘Law of One Price’ which should be in force if these markets are truly integrated. The results show that market integration has not been achieved in a number of cases even when MCAs are subtracted from the price series used.  相似文献   
103.
For a compound Poisson process with negative drift and jump distribution consisting of a mixture of exponentials on [0) and on (-, 0), an exact expression is derived for the probability of hitting the level c, c > 0. the problem is motivated by modeling the returns from trading on financial markets.  相似文献   
104.
Statement of Financial Accounting Standards (SFAS) No. 96, “Accounting for Income Taxes,” issued by the Financial Accounting Standards Board (FASB) in December 1987 changed accounting for income tax recognition and accrual. The original deadline for implementation of SFAS No. 96 was December 15, 1988, and earlier adoption was encouraged. This study examines empirically the stock price impact of four pertinent announcement dates regarding SFAS No. 96 for 19 banks that adopted the statement in late 1987 and early 1988. Our results suggest that these early bank adopters have different characteristics from other banks that cause them to benefit from the changes in accounting for deferred taxes and explain their voluntary adoption of the standard.  相似文献   
105.
The ratio of the yields on short-term tax-exempt and taxable bonds exhibits a sawtooth pattern that is consistent with the impacts of tax deferments from dates on which interest payments are received to dates on which the resulting tax payments are paid. The effect of the tax deferment at turns of calendar years does not differ appreciably from the effect at the turn of any other tax quarter. Investors with tax payment schedules that differ from that of the investor that is indifferent between investing in taxable and tax-exempt bonds may benefit from tax-related timing strategies for investing in these bonds. Issuers may benefit from tax-related timing strategies for scheduling interest payments.  相似文献   
106.
Previous empirical research indicates that corporate insiders tend to increase (decrease) their shareholdings before events that increase (decrease) firm value. More recent evidence suggests, however, that passage of the Insider Trading Sanctions Act of 1984 (ITSA) may have deterred this behavior. Our results indicate that before passage of the ITSA, insiders exploited their access to nonpublic information by selling shares before the announcement of equity issues. However, after passage of the ITSA insiders no longer displayed this behavior. We conclude the ITSA has a deterrent effect, which is more heavily concentrated on insiders at the highest level of the firm who are most visible to regulators and other market participants.  相似文献   
107.
108.
Enterprise risk management (ERM) has captured the attention of risk management professionals and academics worldwide. Unlike the traditional "silo-based" approach to corporate risk management, ERM enables firms to benefit from an integrated approach to managing risk that shifts the focus of the risk management function from primarily defensive to increasingly offensive and strategic. Despite the heightened interest in ERM, little empirical research has been conducted on the topic. This study provides an initial attempt at identifying the determinants of ERM adoption. We construct a sample of firms that have signaled their use of ERM by appointing a Chief Risk Officer (CRO) who is charged with the responsibility of implementing and managing the ERM program. We use a logistic regression framework to compare these firms to a size- and industry-matched control sample. While our results suggest a general absence of differences in the financial and ownership characteristics of sample and control firms, we find that firms with greater financial leverage are more likely to appoint a CRO. This finding is consistent with the hypothesis that firms appoint CROs to reduce information asymmetry regarding the firm's current and expected risk profile.  相似文献   
109.
Food Safety Through Food Irradiation: Should it be Adopted More by the EU? Food Irradiation is a food safety technology that can eliminate disease‐causing germs from foods. Faut il encourager ?irradiation pour améliorer la sécurité des aliments en Europe? ?irradiation des aliments est une technique de sécurité alimentaire, qui permet ?en éliminer les germes pathogènes. De même que la pasteurisation du lait, le traitement par des radiations ionisantes permet de tuer les bactéries susceptibles de causer des infections ?origine alimentaire. Celles‐ci sont toujours présentes, et ont de graves conséquences tant pour la santé que pour ?économie. Aux Etats‐Unis, ?irradiation est une technique autorisée pour beaucoup de produits alimentaires. Dans ce pays, le nombre de restaurants et de supermarchés vendant des produits irradiés a augmenté de façon considérable au cours des trois dernières années. Des expérimentations économiques montrent que les consommateurs américains sont disposés à dépenser pour le b?uf irradié des sommes sensiblement supérieures aux suppléments de coûts associés à?irradiation. En Europe, ?utilisation de ?irradiation comme technique de conservation des aliments, susceptible de s'insérer dans des programmes de sécurité alimentaire rigoureux, est beaucoup plus limitée. Jusqu'ici, laliste des produits dont ?irradiation est autorisée dans ?ensemble de la Communauté Européenne ne contient qu'une seule catégorie de produits alimentaires:les herbes aromatiques, épices, et assaisonnements ?origine végétale. Avec la globalisation des circuits commerciaux et le renforcement, exigé par les agences de régulation, des normes de sécurité du champ à la fourchette, la généralisation de l0'irradiation des produits alimentaires devrait profiter à?ensemble des producteurs et des consommateurs européens. Nahrungsmittelsicherheit durch Bestrahlung von Nahrungsmitteln: Sollte dies in der EU verstärkt angewandt werden? Bei der Bestrahlung von Nahrungsmitteln handelt es sich um ein Verfahren zur Gewährleistung der Nahrungsmittelsicherheit, bei der krankheitsverursachende Keime in den Nahrungsmitteln abgetötet werden. Wie bei der Pasteurisierung von Milch können Bakterien mit Hilfe von ionisierenden Strahlen in Nahrungsmitteln abgetötet werden, die anderenfalls durch Nahrungsmittel übertragbare Erkrankungen hervorrufen würden. Diese Erkrankungen stellen eine permanente Bedrohung dar und Ziehen ernstzunehmende Konsequenzen für Gesundheit und Wirtschaft nach sich. In den USA dürfen verschiedene Nahrungsmittelarten bestrahlt werden. In den vergangenen drei Jahren hat die Anzahl der Supermärkte und Restaurants in den USA, die strahlungsbehandelte Produkte anbieten, enorm zugenommen. Erste ökonomische Versuche in den USA legen es nahe, dass die Bereitschaft der Verbraucher, einen höheren Preis für bestrahltes Rinderhackfleisch zu zahlen, sehr viel höher ist als die mit der Bestrahlung verbundenen zusätzlichen Kosten. Die Anwendung der Bestrahlung von Nahrungsmitteln als Werkzeug zur Gewährleistung der Nahrungsmittelsicherheit, welches die strengenNahrungsmittelsicherheitspro‐gramme ergänzen könnte, ist in Europa eher begrenzt. Bislang handelt es sich bei den Produkten, die für die Bestrahlung innerhalb der gesamten EU zugelassen sind, nur um eine einzige Nahrungsmittelklasse: getrocknete aromatische Kräuter und Gewürze. Durch die zunehmende Nachfrage der Aufsichtsbehörden nach Nahrungsmittelsicherheit ?vom Stall bis zum Teller? und die Globalisierung des Nahrungsmittelhandels könnten die Produzenten und Verbraucher in der EU von einer verstärkten Anwendung der Bestrahlung von Nahrungsmitteln profitieren. Like pasteurization of milk, treating food with ionizing radiation can kill bacteria that would otherwise cause foodborne disease. Foodborne illnesses are ever present and have serious health and economic consequences. In the US, food irradiation is approved for use in various foods. The number of supermarkets and restaurants in the US that offer irradiated products has increased dramatically in the last three years. Preliminary economic experiments in the US suggest that consumer willingness to pay for irradiated ground beef is substantially greater than the additional costs associated with irradiation. The use of food irradiation as a food safety tool that could complement rigorous food safety programmes is rather limited in Europe. So far, the list of products authorized for irradiation within the whole EU contains only a single food category: dried aromatic herbs, spices, and vegetable seasonings. With increasing demand by regulatory authorities on food safety from ‘farm to fork’ and the globalization of food trade, EU producers and consumers may benefit from wider adoption of irradiation of food products.  相似文献   
110.
This paper introduces a simple, yet rich, measure of efficiency changes based on the revenue-generating-ability (RGA) principle. Using this principle, we explain the connections between efficiency changes and the variables, such as pretax profits, interest expense, non-interest expense, profit margins, loan loss provision, and asset quality. These connections are used to explain earnings differences between small and large commercial banks.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号