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   2748篇
  免费   150篇
财政金融   560篇
工业经济   200篇
计划管理   377篇
经济学   518篇
综合类   22篇
运输经济   59篇
旅游经济   252篇
贸易经济   662篇
农业经济   43篇
经济概况   200篇
邮电经济   5篇
  2024年   12篇
  2023年   35篇
  2022年   24篇
  2021年   47篇
  2020年   90篇
  2019年   192篇
  2018年   181篇
  2017年   166篇
  2016年   129篇
  2015年   84篇
  2014年   115篇
  2013年   463篇
  2012年   140篇
  2011年   128篇
  2010年   125篇
  2009年   128篇
  2008年   92篇
  2007年   76篇
  2006年   51篇
  2005年   60篇
  2004年   60篇
  2003年   47篇
  2002年   42篇
  2001年   37篇
  2000年   30篇
  1999年   45篇
  1998年   28篇
  1997年   29篇
  1996年   27篇
  1995年   18篇
  1994年   19篇
  1993年   20篇
  1992年   14篇
  1991年   18篇
  1990年   12篇
  1989年   10篇
  1988年   14篇
  1987年   10篇
  1986年   5篇
  1985年   9篇
  1984年   7篇
  1983年   10篇
  1981年   5篇
  1980年   7篇
  1979年   11篇
  1978年   4篇
  1977年   7篇
  1976年   3篇
  1975年   3篇
  1974年   3篇
排序方式: 共有2898条查询结果,搜索用时 468 毫秒
41.
A bstract . Historians interested in 20th century American reform often seek to analyze the ideologies of political leaders separately from the institutions that these same leaders created. Such emphases on ideas, as opposed to actions, has, for example, led "revisionist" American historians to argue that the presidencies of Herbert Hoover and Franklin D. Roosevelt were "conceptually continuous." Our examination of the major social welfare programs undertaken by the federal government in the 1920s disputes this claim. Examination of the operations of the federal bureaucracy instead of the rhetoric of politicians demonstrates the existence of decided policy differences between the Hoover and Roosevelt eras. "Efficiency" analogues dominant during the Hoover era were replaced with "direct service-provider" approaches which created a clear distinction between private and public welfare programs. Elements of "continuity" between the two eras have been overdrawn. Background is provided for increased understanding of some of the policy implications of America's contemporary welfare debate—particularly about "rehabilitation" strategies and/or rationales for action in the social welfare field.  相似文献   
42.
This note uses the Theorem of the Alternative to prove new results on the implementability of general, asymmetric auctions, and to provide simpler proofs of known results for symmetric auctions. The tradeoff is that type spaces are taken to be finite.  相似文献   
43.
The purpose of this paper is to analyze strategic behavior of vertically integrated firms when there is downstream entry, taking into account the balance between competition in the market and competition for the market. This analysis can serve to explain diverse distributional structures, including the coexistence of vertically integrated firms and independent retailers. And it shows that the relative efficiency of downstream entrants and the level of competition among incumbents are two major factors in determining equilibrium configuration.  相似文献   
44.
The religious factor in private education   总被引:1,自引:0,他引:1  
We quantify the religious factor in private education in the United States by calibrating a political economy model of school choice—among public, private-nonsectarian and subsidized religious schools—in which parents differ in their incomes and in their preferences for religious education. This shows strong latent demand for religious schooling, conditioned on current subsidized tuition levels in parochial schools, which is suppressed by the need to “pay twice” for private education. Applying the results of the calibration to gauge the effect of means-tested school voucher programs on religious and nonsectarian private enrollment, we find that when the amount of the voucher is relatively small, including subsidized religious schools in such programs is necessary for providing low-income families effective access to private education.  相似文献   
45.
This study investigates price relationships between organic and conventional carrots, tomatoes, and lettuce in the U.S. utilizing Nielsen scanner data from 2006–2015. We employ a threshold vector error correction model (TVECM), threshold vector autoregressive model (TVAR), and threshold cointegration test to test whether market integration exists between organic and conventional vegetables as well as the existence of asymmetric price transmission. The results find positive long-run relationships between organic and conventional prices of carrots and tomatoes and show the existence of asymmetric price transmission in price pairs of lettuce and tomatoes. Our findings suggest that the price relationship between organic and conventional vegetables varies by characteristics, such as shelf life, volatility in the price premium, and substitutability.  相似文献   
46.
Given the phenomenal growth or the anticipation of growth in certain information technology industries, concerns for economy of scale, market access and expansion, and the need for ongoing research and development are resulting in mergers, acquisitions, and strategic alliances. A key question in such industries is what is, or should be the going market value of a business? This paper suggests an approach to imbed market penetration models in the popular value-based planning approach suggested by Rappaport [36] to obtain the going market value of a business. The model developed in implementing the approach is tailored for the cellular communications industry. Limitations and adaptations of the approach to other industries are discussed.  相似文献   
47.
This study examines conditions affecting consumer susceptibility to advertising deception and educational efforts designed to inoculate consumers against it. Results show that consumers are best able to detect deception when their frame of reference (cognitive or affective) is incongruent with the advertisement's executional style (attribute or emotional). Attempts to inoculate consumers against deception by providing factual brand comparisons have their strongest effect among consumers with an affective frame of reference and for emotionally charged ads.
Die Immunisierung von Konsumenten gegen werbliche Irreführung: Der Einflu der persönlichen Informationsausrichtung und des werblichen Argumentationsstils
Zusammenfassung Die Studie befa\t sich mit den Bedingungen werblicher Irreführung von Konsumenten und mit den Bemühungen der Verbrauchererziehung, Konsumenten durch vergleichende Warentestergebnisse gegen solche Irreführung zu immunisieren. Ihre Ergebnisse zeigen, da\ Konsumenten werbliche Irreführung am ehesten dann durchschauen, wenn ihre persönliche Informationsausrichtung (kognitiv oder affektiv) nicht mit dem werblichen Argumentationsstil (informativ oder emotional) übereinstimmt. Versuche, Konsumenten mit Hilfe vergleichender Warentest-Informationen gegen werbliche TÄuschung zu immunisieren, sind am wirkungsvollsten bei Konsumenten mit affektiver Informationsausrichtung und bei emotionshaltiger Werbung.


The authors wish to thank Joel Cohen and the Editors and reviewersof Journal of Consumer Policy for their valued suggestions, and Jill Joyce for assistance in data collection and analysis.  相似文献   
48.
We find that positive excess (strong) analyst coverage is associated with overvaluation and low future returns. This finding is consistent with the view that excessive analyst coverage, driven by investment banking incentives and analyst self-interests, raises investor optimism causing share prices to trade above fundamental value. However, weak analyst coverage causes stocks to trade below fundamental values. This finding indicates that investors tend to believe that these firms are more likely to be plagued by information asymmetries and agency problems. The results remain robust after controlling for the possible endogenous nature of analyst coverage and analysts' self-selection bias.  相似文献   
49.
This paper shows that the firm has an incentive to issue multiple classes of debt that are differentiated by seniority to enhance securityholder tax-timing option values. The analysis establishes that there is at least one mix of senior and junior debt that maximizes the tax option gain from having multiple priority classes of debt. An analytic example provides specifications for the optimal amount of leverage and the optimal mix of senior and junior debt. Relative to the case of only one class of debt, a multiple debt priority structure increases the optimal amount of corporate leverage.  相似文献   
50.
What do we know about technology and rights? This article provides a fairly comprehensive overview of current issues regarding this topic. We explore and analyse a wide spectrum of rights that are challenged in this current era of technological convergence. We use the United States Bill of Rights as an example of the vulnerability of legal protections for rights against particular political and technological changes in this post 9-11 climate. New streams of rights acting as a safeguard against further incursions of technology into civil liberties are explored. We also address intellectual property rights and international trends in copyright, patent and trademark laws. We question whether these issues of technology and rights have a place in current technological literacy scenarios.  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