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   14950篇
  免费   450篇
  国内免费   13篇
财政金融   2540篇
工业经济   1096篇
计划管理   2571篇
经济学   3367篇
综合类   301篇
运输经济   138篇
旅游经济   307篇
贸易经济   2777篇
农业经济   785篇
经济概况   1507篇
邮电经济   24篇
  2022年   80篇
  2021年   124篇
  2020年   212篇
  2019年   290篇
  2018年   388篇
  2017年   421篇
  2016年   395篇
  2015年   267篇
  2014年   392篇
  2013年   1555篇
  2012年   435篇
  2011年   447篇
  2010年   429篇
  2009年   444篇
  2008年   492篇
  2007年   445篇
  2006年   358篇
  2005年   354篇
  2004年   311篇
  2003年   320篇
  2002年   292篇
  2001年   285篇
  2000年   284篇
  1999年   258篇
  1998年   263篇
  1997年   263篇
  1996年   265篇
  1995年   245篇
  1994年   229篇
  1993年   252篇
  1992年   239篇
  1991年   227篇
  1990年   213篇
  1989年   184篇
  1988年   143篇
  1987年   175篇
  1986年   176篇
  1985年   261篇
  1984年   272篇
  1983年   263篇
  1982年   233篇
  1981年   235篇
  1980年   198篇
  1979年   209篇
  1978年   152篇
  1977年   158篇
  1976年   138篇
  1975年   108篇
  1974年   104篇
  1973年   93篇
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
21.
Based on intergenerational data from the Panel Study of Income Dynamics, I provide estimates of income mobility across generations for men. Special attention is paid to issues of censoring caused by a son's unemployment. Employing non‐parametric bounds estimates, I illustrate that previous income mobility estimates rely heavily on (unjustified) assumptions of exogenous selection. Assuming a son's potential income is instead a function of his reason for unemployment and work history, I re‐estimate mobility. Allowing for sampling variability, the range of feasible slopes consistent with these modified bounds restrictions is 0.27 to 0.55. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
22.
As educators in the field of risk management and insurance, we see know- ledge of risk management and insurance as a core business function. However, some colleagues and students see insurance as cold-call sales or companies with a lot of money that continue to raise their prices. So we have to find ways to make our public aware of the usefulness of risk management and insurance in the business world and in private life and of the opportunities that having such knowledge presents to all business majors and business people. One method that is beginning to show dramatic improvements in at least our students' perceptions of the field and the major involves industry-sponsored game nights. While not an academic endeavor nor strictly risk management education, we believe the idea provides a useful tool for opening students' eyes to the need for knowledge of risk management and insurance and of the opportunities that are available in the insurance industry and its related fields. This article discusses the history of such an event at Appalachian State Univer- sity, the current status of the North Carolina Surplus Lines Association (NCSLA) event, and the benefits of the event.  相似文献   
23.
This article focuses on the housing issues of rural migrants arising from urbanization, with particular reference to chengzhongcun, a topic with considerable impact on policymaking. An attempt is made to understand the underlying rationale of self‐help in housing and the important role of chengzhongcun in sheltering rural migrants in the context of China's rural‐urban dichotomy. As demonstrated in this study, chengzhongcun accommodate, with little in the way of government resources and assistance, millions of rural migrants because of their social accessibility and affordability. While not denying their social problems, we argue that chengzhongcun in fact act as an innovative and positive agent to promote urbanization in present day China by housing massive numbers of rural migrants and assimilating them into cities. Current government policies towards chengzhongcun have generated a wide range of interest conflicts and confrontations. The consequences of such conflicts show that the government policies were problematic and unworkable, as they violated basic market principles as well as citizen rights. Policy strategy towards the redevelopment of chengzhongcun must acknowledge their credibility in the Chinese road to urbanization and requires more thoughtful and prudent consideration of migrants' demands for affordable housing.  相似文献   
24.
The effects of competitive interactions on investment decisionsand on the dynamics of the price of a nonstorable commodityare studied in a model of incremental investment with time tobuild and operating flexibility. I find that an increase inuncertainty may encourage firms to increase their capacity.Furthermore, I show that it may be optimal to invest in additionalcapacity during periods in which part of the operational capacityis not being utilized. The impact of competition on the propertiesof the endogenous output price is dramatic. For example, I findthat price volatility may be increasing in the number of competitorsin the industry.  相似文献   
25.
26.
Consumers act out roles throughout their lives. Marketers assist in this role playing by providing the wardrobes, props, and sets in the form of products and services. They also help people understand acceptable role behavior by portraying roles in their communication programs. Consumers assume new roles as they age. This article is designed to enhance understanding of the often-ignored roles that accompany aging and provides examples of and suggestions for effective marketing for these role transitions.  相似文献   
27.
The introduction of traffic management schemes has been one response of the National Parks to the problem of ever-increasing car-borne visitors and the consequent damage caused to the rural environment. By reviewing these schemes and by determining and explaining attitudes towards one particular traffic management experiment, the paper aims to deduce lessons for future policy. The analysis, based on two visitor surveys, suggests that the likelihood of success is improved when schemes are integrated, containing both ‘carrot’ and ‘stick’ elements. Since public perceptions are also found to be pivotal to its success, appropriate marketing of a scheme is vital. The paper concludes, however, that to achieve the fundamental objective of greater accessibility with less mobility, a more wide-ranging marketing effort is required intended to engender a sea change in attitude towards both the car and public transport.  相似文献   
28.
Cristina Puentes-Markides 《Futures》1995,27(9-10):1067-1075
The Pan American Health Organization (PAHO), Regional Office of the World Health Organization, is a United Nations agency specializing in providing technical cooperation in health to the countries of Latin America and the Caribbean. A futures approach has much to offer in this endeavour, and PAHO is making health futures tools available to its Member States through a variety of activities. The purpose of promoting futures thinking and the application of futures tools is to improve health-policy planning and public health action within the framework of the ‘Health for All’ vision and PAHO's current Strategic and Programmatic Orientations.  相似文献   
29.
Futures research includes the problem of generating reasonably exhaustive and plausible scenarios for a given topic, a problem for which there are no truly satisfactory solutions. This article reviews and evaluates a method, field anomaly relaxation, first put forward some 20 years ago. The evaluation is in the context of an illustrative study of political developments in Europe. The research reconstructs and further develops the method and concludes that it has something to offer for scenario generation. Its weaknesses are identified and suggestions for further research are made.  相似文献   
30.
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