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   137295篇
  免费   3210篇
  国内免费   2篇
财政金融   25776篇
工业经济   11597篇
计划管理   21741篇
经济学   29376篇
综合类   1465篇
运输经济   958篇
旅游经济   2487篇
贸易经济   23585篇
农业经济   6149篇
经济概况   17125篇
信息产业经济   8篇
邮电经济   240篇
  2021年   838篇
  2020年   1619篇
  2019年   2392篇
  2018年   2389篇
  2017年   2546篇
  2016年   2750篇
  2015年   2083篇
  2014年   3391篇
  2013年   15249篇
  2012年   4206篇
  2011年   4241篇
  2010年   3754篇
  2009年   4358篇
  2008年   3945篇
  2007年   3282篇
  2006年   3576篇
  2005年   3566篇
  2004年   3130篇
  2003年   2896篇
  2002年   2870篇
  2001年   2628篇
  2000年   2567篇
  1999年   2465篇
  1998年   2296篇
  1997年   2355篇
  1996年   2228篇
  1995年   2022篇
  1994年   2032篇
  1993年   2023篇
  1992年   2076篇
  1991年   1960篇
  1990年   1833篇
  1989年   1681篇
  1988年   1625篇
  1987年   1625篇
  1986年   1719篇
  1985年   2475篇
  1984年   2332篇
  1983年   2137篇
  1982年   1996篇
  1981年   1930篇
  1980年   1918篇
  1979年   1829篇
  1978年   1653篇
  1977年   1634篇
  1976年   1387篇
  1975年   1284篇
  1974年   1188篇
  1973年   1184篇
  1972年   896篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
891.
Summary The excess burden of a tax is the diminution of utility above that which would have occurred had the tax been collected as a lump sum. Computing the excess burden for the 1983 and 1985 Dutch tax and social premium system enables a partial welfare evaluation of the recent changes in the system, the so-called Tweeverdienersmaatregelen. Based on the equivalent and compensating variation, the excess burden as a percentage of the taxes and social premiums for the 1983 and 1985 system are valued at 27010 and 84010, and 37010 and 58010 respectively. This result indicates that, welfare-theoretically, the old system seems preferable to the new one.The author wishes to thank Hans Doodeman, Paul Renaud and Jacques Siegers for their critical remarks on an earlier version of this article.  相似文献   
892.
This overview of the World Bank 1992 World Development Report reveals some of the means to close the gap between policy and practice in linking environmental and development policy. The nature of the problem is defined and win-win policies which show mutual support for environment and development concerns are differentiated from negative links. Sound environmental management can be achieved with improved information, enhancing institutional arrangements, and involving local people. The rapid implementation of policies and programs will involve both political and financial costs and a shift in policies and priorities. The challenges ahead are tremendous and include overcoming poverty and turning population growth and environmental pollution around. World consumption of energy and manufactured goods is expected to triple; without curbs on emissions, mortality increases, water shortages, and forest and natural habitat loss will ensue. It is not entirely true that economic activity hurts the environment when positive forces of substitution, technological innovation, and structural change outweigh the negative consequences. Environmental consequences change with income levels. Some problems decline with income increases. Some problems deteriorate temporarily and then improve as incomes rise, i.e., air and water pollution and some types of deforestation and habitat dislocation. Some problems continue to grow with income increases, such as carbon and nitrogen oxide emissions. Win-win policies are ones that foster and end to excessive resource use, clarify property rights and stop open access to land, accelerate education and family planning programs, accelerate agricultural extension and research, and invest in sanitation and water supply. These policies will not sacrifice economic growth. Tradeoffs must be identified and costs and benefits of alternative policies assessed; priorities and standards must be established in consort with costs and benefits. Behavior change can be achieved with properly designed practical and cost-effective policies.  相似文献   
893.
Bohrer RA 《Futures》1992,24(7):681-688
It is argued that the genetic engineering revolution now under way is fundamentally different from other industrial revolutions in that humans are developing the technological power to change themselves. This article begins with an overview of the technology involved, discusses the Human Genome Initiative (HGI) programme and gene therapy research, and then uses several possible future scenarios to discuss potential legal and ethical issues.  相似文献   
894.
Assessing and acquiring technology does not have to be chaotic, driven solely by price, clinical preference, and emotion. With the tools available, it can be distilled to a process of organized common sense, which results in maximum flexibility for the user and allows materiel managers to procure the best, most cost-effective equipment for the hospital.  相似文献   
895.
The deregulatory trend and advances in technology during the 1980s removed many restrictions on the ability of U.S. depository financial institutions to obtain and redistribute funds across diverse geographical markets. This pervasive deregulation and innovation should have increased the degree of integration between different geographical financial markets. Yet there is little empirical evidence available on the validity of this expectation. It is important to provide such evidence since much of the U.S. depository institution regulatory policy is predicated on the assumption of highly localized, segmented financial markets. Considering alternative breakpoints at 1980 (DIDMCA) and at 1982 (Garn-St Germain), the current study tests the hypothesis that the degree of geographical financial integration after this period exceeded that prior to this period. Mortgage markets are focused on due to their historical importance in the regulation of funds flows. The study finds a significant increase in the mean contemporaneous correlation among FHLB districts' mortagage rate residuals in a vector-autoregressive system between two test periods. Further analysis shows that the distance between FHLB districts' headquarters and their respective pairwise interdistrict correlation coefficients are negatively related in the prior period but not significantly related in the later period. Economic booms and busts alternated among the districts over the two sample periods in a manner consistent with the reallocation of capital among more integrated financial markets. Individual districts' mortgage rates have been more sensitive to variations in national credit market conditions since deregulation was legally recognized by DIDMCA in 1980. Thus, the collective empirical evidence found in this study indicates that mortgage markets have responded to deregulation and marked technological advances by moving toward a national, highly integrated market. Regulators' preoccupation with highly localized, segmented markets must consequently be reexamined.  相似文献   
896.
897.
Globe Metallurgical Inc., a $115 million supplier of specialty metals, is best known as the first small company to win the Baldrige Award in 1988. But there is much more to this gutsy little company than total quality. During the 1980s, Globe transformed itself from a rust-belt has-been on the verge of bankruptcy into a high-technology, high-quality industry leader. Along the way, the company went private in a management-led leveraged buyout, embraced flexible work teams, adopted a high-value-added, niche marketing strategy, and took its business global. Leading the way in Globe's reinvention was Chief Executive Arden C. Sims, the slow-talking son of a West Virginian coal miner. When he joined the company in 1984, Sims had no experience in the new managerial techniques. He was a product of the old school of management: cut costs and trim operations to regain competitiveness. But he soon discovered that old-style management was not enough to battle offshore competitors, an unproductive work force, rising costs, and outdated production technology. He was forced to go looking for new ideas and practices. In a succession of learning experiences, Sims attended a seminar on total quality in 1985, paving the way for the company's quality program; he discovered the power of flexible work teams when management was forced to run the furnaces during a year-long strike; he organized an LBO, allowing him to change the work order even more dramatically; and he took the company global and into highly profitable niche markets by severing a long-standing relationship with Globe's sales and marketing representative. As a result of these and other changes, Globe leads the specialty metals industry in virtually all performance measures.  相似文献   
898.
This study suggests a model of economic development which treats knowledge accumulation as an endogenous variable. It examines possible dynamic processes in an economic system which accumulates knowledge from developed nations. We describe the dynamics of the system by the interactions of three variables—economic conditions, level of knowledge, and openness. The introduction of openness as an important endogenous variable is due to the fact that the development model considered here is primarily concerned with the economic dynamics of the People's Republic of China. We are especially interested in nonlinear phenomena such as catastrophes and limit cycles. We show that small shifts in political policies may result in great social structural changes.The author is very grateful to two anonymous referees for important comments and to an anonymous referee for linguistic help.  相似文献   
899.
Summary Two theorems are given; the first extends the Sonnenschein-Mantel-Debreu theorem characterizing aggregate demand functions from the set ofn2 commodities to all of the 2 n –(n+1) subsets of two or more commodities. The second theorem concerns spatial voting models for k2 candidates over a space of n2 issues. The theorem characterizes the sincere elecion rankings of thek candidates over all of the 2 n –1 subsets of one or more issues. Both theorems have the same kind of conclusion; anything can happen. By demonstrating the mathematical reasons for these conclusions and by recalling related, recent results from statistics, voting, and economics, it is argued that this anything can happen conclusion is the type one must anticipate for aggregation procedures; particularly for the processes commonly used in economic models where the procedure is responsive to changes in agents' preferences, changes in data, etc.I am pleased to acknowledge conversations with L. Hurwicz, A. Mas-Colell and C. Simon about this material. In particular, I want to thank J. Jordan for his several helpful suggestions. Also, I benefited from comments made at meetings and seminars where these results were presented; this includes a June, 1990, conference in Stockholm, Sweden. Some stylistic suggestions were made by Arvid and Padon Kalinen. This research was supported, in part, by NSF Grant IRI-8803505.  相似文献   
900.

Editorial

An appreciation of our referees  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