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   15410篇
  免费   387篇
  国内免费   1篇
财政金融   3245篇
工业经济   1214篇
计划管理   2430篇
经济学   3296篇
综合类   168篇
运输经济   108篇
旅游经济   247篇
贸易经济   2478篇
农业经济   725篇
经济概况   1869篇
信息产业经济   2篇
邮电经济   16篇
  2023年   78篇
  2021年   98篇
  2020年   206篇
  2019年   283篇
  2018年   373篇
  2017年   375篇
  2016年   351篇
  2015年   234篇
  2014年   369篇
  2013年   1698篇
  2012年   443篇
  2011年   516篇
  2010年   462篇
  2009年   501篇
  2008年   460篇
  2007年   421篇
  2006年   377篇
  2005年   304篇
  2004年   315篇
  2003年   328篇
  2002年   314篇
  2001年   304篇
  2000年   321篇
  1999年   315篇
  1998年   321篇
  1997年   285篇
  1996年   242篇
  1995年   235篇
  1994年   254篇
  1993年   258篇
  1992年   276篇
  1991年   269篇
  1990年   213篇
  1989年   194篇
  1988年   180篇
  1987年   166篇
  1986年   177篇
  1985年   250篇
  1984年   274篇
  1983年   260篇
  1982年   218篇
  1981年   201篇
  1980年   181篇
  1979年   176篇
  1978年   160篇
  1977年   141篇
  1976年   133篇
  1975年   144篇
  1974年   106篇
  1973年   106篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
951.
This account explores certain aspects of the developments in international, interEuropean holiday travel as a part of the phenomena characterised as modernity and Europeanisation. The focus is on the idea of 'travelling parochialism', i.e. whether large proportions of contemporary international holidaymakers and other travellers on their tours within Europe adopt some kind of furtherance of a home-like culture. The main point of departure is the idea of the 'tourist bubble' understood here as a territorial and functional differentiation and as an expectation of holidaymakers going abroad. The concept of 'travel ecumene' is introduced to examine implications for travellers of the development of a western European travel system. Moreover, the study analyses the extent to which the notion of the tourist bubble is still beneficial in comprehending significant aspects of inter-European holiday travel in relation to current discourses of internationalisation, Europeanisation and cosmopolitanism. The paper also discusses advances of cosmopolitan predilections and aspirations and their possible influences on contemporary international European tourism.  相似文献   
952.
In this paper, we study a (weak) vector equilibrium principle with capacity constraints of arcs and common arcs in some different paths. We obtain some necessary and sufficient conditions for a (weak) vector minimum cost flow. By virtue of a (weak) Δ-equilibrium principle, we also derive some necessary and sufficient conditions for a weak vector equilibrium flow.  相似文献   
953.
This paper presents an evacuation route planning model that both accounts for demand uncertainty (i.e. the number of evacuees) as well as capacity uncertainty (i.e. the road capacities). To ensure reliability, the model plans for more evacuees (i.e. demand inflation) and less road capacity (i.e. supply deflation). A major contribution is that we provide a framework to determine the amount of demand inflation/supply deflation necessary to ensure a user-specified reliability level. The model is shown to be a natural generalization of previously proposed evacuation models. A small numerical case study reveals the key characteristics of the model.  相似文献   
954.
After several years of New Public Management reforms within public transport, coordination seems to receive increased attention. With examples of actual as well as suggested changes taken from Denmark, Sweden and the UK the aim of the article is to analyse and classify the mechanisms utilized and suggested to increase coordination between core stakeholders within passenger railway services and bus services. Four distinctive mechanisms of coordination are suggested, namely organisational coordination, contractual coordination, partnership coordination and discursive coordination. Each coordination mechanism has its strengths and failures. The article also debates to what extent the mechanisms conflict with three core characteristics of New Public Management: Unbundling of the public sector into corporatized units; more contract-based competitive provision; and greater emphasis on output controls.  相似文献   
955.
The emergence of Internet‐based distribution channels has created both opportunities for and challenges to the travel agencies. Based on the customer‐value perspective, this study focused on exploring the relative weights of the nine proposed fundamental travel products from an Internet perspective.

The study cohort comprised customers who had purchased room products from travel agencies websites, with data collected using a questionnaire survey. Customers were surveyed during a 3‐month period at Taipei International Airport. Excluding useless questionnaires resulted in 131 respondents, corresponding to a response rate of 18.71%.

We found that privacy, safety, and product quality were the three most important factors influencing customer purchases of room products on the Internet. The results of this study have some implications for travel agencies—companies will need to make a significant investment in website design of safety mechanism, and the greater the effort managers make to alleviate these concerns, the more likely it is that consumers will visit and buy products on their website.  相似文献   
956.
The westernization of Asian countries has led to the rapid expansion of Western-style fast-food restaurants, which are believed to be fueling an unprecedented rise in body mass in these countries. This study tests this belief using longitudinal data from China. Exploiting the opening of a Western-style fast-food restaurant in a particular community, we conduct a transition analysis to make a more convincing causal interpretation than the standard cross-sectional or fixed-effects approach. Considering several measures of fatness, we find no robust evidence of Western fast food having a substantial effect overall, but there is some indication of effect heterogeneity.  相似文献   
957.
The article analyzes the current state of Russian–French investment relations and their prospects, and highlights the factors determining them. Special attention has been paid to sectoral and regional aspects of French investment in Russia.  相似文献   
958.
Voter participation rates vary widely across the 50 states and the District of Columbia. This empirical study seeks, within the context of a broadened version of the “rational voter model,” to identify determinants of this geographic variation. Using the 2014 mid-term general election, it was found that the voter participation rate across states and the District of Columbia was positively related to whether there is a close governor’s race or a close U.S. Senate race, the female labor force participation rate, the percent of the population aged 65 and over, the number of referenda on the ballot, and the degree of voting-by-mail usage. In addition, it was found that voter turnout was negatively related to the percentages of the population that are either Hispanic or Afro-American.  相似文献   
959.
Household surveys provide data that is used for identifying and measuring the poverty status of households and individuals. However, carrying out such surveys is expensive, especially in poor developing countries. Thus it is important to make maximum use of the available survey data in developing countries, especially in sub‐Saharan Africa, where such data are expensive to collect and analyse. This paper develops a simple method for using poverty indices derived from survey data for a given year, to predict poverty rates for subsequent periods without having to conduct a new household survey. We illustrate the workings of the method with data from Kenyan household surveys for 1994 and 1997.  相似文献   
960.
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