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   3021篇
  免费   134篇
  国内免费   36篇
财政金融   284篇
工业经济   106篇
计划管理   426篇
经济学   718篇
综合类   311篇
运输经济   138篇
旅游经济   123篇
贸易经济   583篇
农业经济   246篇
经济概况   256篇
  2024年   6篇
  2023年   50篇
  2022年   24篇
  2021年   64篇
  2020年   110篇
  2019年   117篇
  2018年   93篇
  2017年   109篇
  2016年   110篇
  2015年   91篇
  2014年   169篇
  2013年   315篇
  2012年   172篇
  2011年   225篇
  2010年   137篇
  2009年   193篇
  2008年   231篇
  2007年   173篇
  2006年   198篇
  2005年   148篇
  2004年   102篇
  2003年   67篇
  2002年   65篇
  2001年   62篇
  2000年   27篇
  1999年   30篇
  1998年   17篇
  1997年   22篇
  1996年   20篇
  1995年   8篇
  1994年   15篇
  1993年   3篇
  1992年   3篇
  1991年   3篇
  1990年   2篇
  1988年   3篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   2篇
  1983年   1篇
  1980年   1篇
排序方式: 共有3191条查询结果,搜索用时 234 毫秒
991.
This paper investigates the role played by different site characteristics in influencing people's choice of outdoor recreation destinations. Contrary to prior studies, our experiment accounts for a large diversity of eligible landscapes described using photomontages. We use a discrete choice experiment (DCE) proposing respondents to choose among hypothetical destinations described in terms of eight site characteristics. We study the trade-offs made by various profiles of respondents among those site characteristics, resulting in different destination choices. The DCE attributes are spatially explicit to represent recreational patterns in the form of site quality maps using Geographic Information Systems (GIS). We conclude by stressing implications of this research for tourism and land management policy-making in peri-urban environments. Interestingly, preferences for site characteristics vary significantly with the recreational activities that respondents engage in. Hikers and cyclists preferences should be particularly considered in future planning decisions.  相似文献   
992.
Many investment models in discrete or continuous‐time settings boil down to maximizing an objective of the quantile function of the decision variable. This quantile optimization problem is known as the quantile formulation of the original investment problem. Under certain monotonicity assumptions, several schemes to solve such quantile optimization problems have been proposed in the literature. In this paper, we propose a change‐of‐variable and relaxation method to solve the quantile optimization problems without using the calculus of variations or making any monotonicity assumptions. The method is demonstrated through a portfolio choice problem under rank‐dependent utility theory (RDUT). We show that this problem is equivalent to a classical Merton's portfolio choice problem under expected utility theory with the same utility function but a different pricing kernel explicitly determined by the given pricing kernel and probability weighting function. With this result, the feasibility, well‐posedness, attainability, and uniqueness issues for the portfolio choice problem under RDUT are solved. It is also shown that solving functional optimization problems may reduce to solving probabilistic optimization problems. The method is applicable to general models with law‐invariant preference measures including portfolio choice models under cumulative prospect theory (CPT) or RDUT, Yaari's dual model, Lopes' SP/A model, and optimal stopping models under CPT or RDUT.  相似文献   
993.
Carsharing programs have demonstrated a potential to significantly shift incentives with regard to private vehicle ownership. The advent of free-floating vehicle fleets has enabled providers to offer ubiquitous vehicle access in designated urban areas. The ability of users to choose where to drop off vehicles presents the possibility that the density of available vehicles in particular areas will be insufficient to supply a reasonable level of service to local residents. The current paper will use exclusive data on vehicle location from a free-floating carshare service that operates in ten U.S. cities. Analysis will relate the availability of vehicles to census tract demographics. Results show vehicles cluster in tracts that are disproportionately populated by residents who are educated, young, employed, and white. Carshare systems have received significant in-kind incentives from government to operate. The mobility benefits of free-floating carshare systems appear to accrue disproportionately to advantaged populations.  相似文献   
994.
《Journal of Retailing》2015,91(2):272-288
More and more grocery retailers are becoming multi-channel retailers, as they are opening an online alternative next to their traditional offline supermarkets. While the number of multi-channel grocery shoppers is also expanding at a fast growth rate, there are still large differences in online shopping frequency, and as a result, in the levels of experience with buying in the online grocery channel. This study wants to (i) identify the underlying drivers of online store choice and (ii) explore if and how these drivers change when multi-channel shoppers gain online grocery shopping experience. We investigate this question with an online store choice model using purchase data of an extensive UK household panel over a two-year period, covering all multi-channel retailers in the grocery market. Our results show that multi-channel shoppers, at the start of online grocery shopping, tend to select the online store belonging to the same chain as their preferred offline store, especially when the online store is strongly integrated with the offline store in terms of assortment. When online grocery shopping experience increases, multi-channel shoppers’ focus shifts from a comparison within a chain across channels to a comparison across chains within the online channel, resulting in an increasing importance of online assortment attractiveness and online loyalty when choosing an online store.  相似文献   
995.
We argue that the influence of the home country wanes as the firm increases its geographic reach. We introduce the concept of the “home base” to capture the effect of the set of countries in which the firm operates. We expect the dynamic liability of foreignness defined relative to the home base to be a better predictor than the static liability of foreignness defined relative to the home country. We also expect the diversity of foreign experience to increase foreign market entry. We find support for these hypotheses with data on Chinese listed firms investing abroad between 1991 and 2007. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
996.
997.
The purposes of this study are to demonstrate how it is possible to determine which attributes are the most important in the final choices of tourists who use a travel agent brochure as a source of information and how these attributes influence perceived value in a pre‐purchase stage. We conduct the study in three phases: (i) a qualitative study, (ii) an experiment using choice‐based conjoint analysis by means of a fractional factorial experimental design and (iii) another experiment using a full factorial derived from the same design. Results suggest advertisement size, a hotel's starred rating and price influence perceived value at this stage. The presence of a positive combined effect of price and advertising was found. Implications and directions for future applications are offered, focusing particularly on marketing services. Copyright © 2012 John Wiley & Sons, Ltd.  相似文献   
998.
在我国高速铁路网快速发展的背景下,有必要对铁路客运网络与旅客出行行为的关系进行深入研究,为路网规划提供参考依据。基于路网规划阶段确定的包含高速铁路与普速铁路的网络布局结构特征,对铁路旅客出行路径的选择倾向进行研究,建立了用于反映铁路旅客出行路径选择倾向的多项Logit模型,提出了相应的铁路旅客出行路径搜索算法,通过算例分析,验证了模型与算法的有效性,并对铁路路网规划工作提出建议。  相似文献   
999.
发展烟农专业合作社,是现代烟草农业建设的重要抓手与关键环节。作为我国重要烟叶产区之一,重庆发展烟农专业合作社已有近6年的历史,逐渐形成了烟叶站点依托型、经理团队负责型、单一能人主导型、社队关系松散型等多种建设模式,但同时仍然面临基础条件不足、能人队伍缺乏、内生需求不足等一系列问题。基于此,应重点在适度规模种植、基础设施建设、能人队伍培育、规范内部管理等方面进行加强。  相似文献   
1000.
The literature has highlighted the relevance of segmenting the tourism market as a start point for developing the right tourism policy recommendations. The present study examines the rural tourism market on the island of La Palma (Canary Islands) and its relationship with territorial factors. Specifically, it attempts to establish the role played in tourists' accommodation location choice by territorial and related factors (for instance, the area of the island, proximity to the beach, hours of sunshine, etc.) compared to other factors. A sample of 316 tourists who holidayed in rural tourism accommodation in La Palma during the period from July to September in 2007 was selected for this purpose. The methodology consisted of a preliminary analysis of the associations between the variables and their modalities, followed by a multiple correspondence analysis (MCA). The results of the study allow to conclude that the weight of territorial variables in the choice of destination and accommodation location can vary substantially depending on the market segment considered.  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