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   27688篇
  免费   771篇
财政金融   4957篇
工业经济   2066篇
计划管理   4780篇
经济学   6450篇
综合类   296篇
运输经济   202篇
旅游经济   404篇
贸易经济   4868篇
农业经济   1348篇
经济概况   2965篇
信息产业经济   3篇
邮电经济   120篇
  2023年   142篇
  2021年   203篇
  2020年   366篇
  2019年   558篇
  2018年   625篇
  2017年   665篇
  2016年   689篇
  2015年   475篇
  2014年   714篇
  2013年   2946篇
  2012年   995篇
  2011年   1020篇
  2010年   887篇
  2009年   1018篇
  2008年   902篇
  2007年   817篇
  2006年   757篇
  2005年   659篇
  2004年   592篇
  2003年   619篇
  2002年   538篇
  2001年   608篇
  2000年   545篇
  1999年   506篇
  1998年   562篇
  1997年   505篇
  1996年   496篇
  1995年   432篇
  1994年   442篇
  1993年   412篇
  1992年   433篇
  1991年   434篇
  1990年   400篇
  1989年   313篇
  1988年   312篇
  1987年   306篇
  1986年   304篇
  1985年   426篇
  1984年   418篇
  1983年   380篇
  1982年   357篇
  1981年   327篇
  1980年   328篇
  1979年   313篇
  1978年   261篇
  1977年   213篇
  1976年   211篇
  1975年   188篇
  1974年   164篇
  1973年   165篇
排序方式: 共有10000条查询结果,搜索用时 375 毫秒
991.
Companies, investors, and regulators around the world are now seeking to tie executives' payoffs to long-term results and avoid rewarding executives for short-term gains. Focusing on equity-based compensation, the primary component of top executives' pay, the authors analyze how such compensation should best be structured to provide executives with incentives to focus on long-term value creation.
To improve the link between equity compensation and long-term results, the authors recommend that executives be prevented from unwinding their equity incentives for a significant time period after vesting. At the same time, however, the authors suggest that it would be counterproductive to require that executives hold their equity incentives until retirement, as some have proposed. Instead, the authors recommend that companies adopt a combination of "grant-based" and "aggregate" limitations on the unwinding of equity incentives.
Grant-based limitations would allow executives to unwind the equity incentives associated with a particular grant only gradually after vesting, according to a fixed, pre-specified schedule put in place at the time of the grant. Aggregate limitations on unwinding would prevent an executive from unloading more than a specified fraction of the executive's freely disposable equity incentives in any given year.
Finally, the authors emphasize the need for effective limitations on executives' use of hedging and derivative transactions that would weaken the connection between executive payoffs and long-term stock values that a well-designed equity arrangement should produce.  相似文献   
992.
993.
This paper proposes an alternative approach to investigate the non-linear effect of external debt on growth. In the theoretical part, we develop an endogenous growth model with formal and informal sectors to analyse the effect of the public external debt on the production efficiency. We show that an increase of the public external debt share increases the production efficiency through a positive externality effect. However, it generates an opposite effect via the reduction of the formal sector’s size in favour of a less efficient informal sector. The resultant effect becomes negative beyond an optimal level. Besides, we show that a large stock of public external debt reduces the production efficiency when it leads to a tight fiscal policy which reduces the formal sector size. Empirically, using a stochastic frontier technique with unobserved heterogeneity, for a panel of 27 developing countries for the period of 1970–2005, we confirm that the turning point associated to the effect of the share external public debt is apparent at 84%.  相似文献   
994.
This article describes the results of a scientific discourse which aimed at exploring the reasons for differences in expert health risk assessment of radio frequency electromagnetic fields of mobile telephony.

It starts with describing the structure of the discourse. Then, the reasons for the conflicting risk assessments are discussed. Differences are due to the selection and evaluation of relevant scientific studies by applying different scientific quality standards, to the methods used for generating a research synthesis and an overall risk evaluation. Consensus could be achieved regarding the selection of and the quality requirements for the scientific studies used for risk assessment as well as their significance for risk evaluation. However, dissent remained about the synthesis of scientific evidence into an overall risk evaluation and about the relevance of the precautionary principle for risk evaluation and its implications for the risk assessment framework.

Based on the analysis of these problems, a transparent, consistent and rational procedure for risk assessment is suggested to facilitate a risk characterization which better meets the demands of policy making and the public for an appropriate risk evaluation.  相似文献   
995.
In this paper, a sustainable industrial marketing framework of latest requirement of green and sustainable operation is proposed. When literatures in strategy, marketing and operation have provided insight about the efficiency of reverse logistics and business value for the customer, the interrelationship is still under explored. This raises the question whether manufacturers could determine ecological friendly strategies to address their customer's environmental conscious needs and design the suitable solution to strike the balance between ecology and economics. Based on the case study of a medical product manufacturer, this study addresses this question by investigating how manufacturers identify the problem of reverse logistics; design and develop of sustainable product and service by enhancing the efficiency of operations, and market competencies that add value to their customers' business processes. Within the strategy for designing for effective reverse logistics, these findings contribute to understand the use of information system and technology for reverse logistics to enhance the customer's business process and provide value-added process for customer retention.  相似文献   
996.
A flood of emigration from Hong Kong to Canada was observed prior to the handover from Britain back to China in 1997. I pool Canadian Census data from 1991 to 2006 to study the labour market assimilation of Hong Kong immigrants. The findings suggest that these immigrants faced a significant negative wage gap upon entry in comparison with Canadian‐born individuals, and this was larger for cohorts arriving closer to 1997, suggesting a decline in cohort quality. The results also indicate that earnings convergence with the Canadian‐born was slow for the majority of these immigrants.  相似文献   
997.
The variation in legal system quality across states in Mexico is used to examine the relationship between judicial quality and firm size over the course of the 2000s, when systemic changes were taking place. Using economic census microdata and survey‐based measures of legal institutions, a robust effect of judicial quality is observed on the firm size distribution and efficiency, instrumenting for underlying historical determinants of institutions. Indicative evidence is found that the effect is strongest in more capital‐intensive industries. Market size and distance‐to‐market are also found to matter for firm size outcomes, consistent with the new trade literature.  相似文献   
998.
999.
Abstract

Parents play a critical role in promoting fruit and vegetable consumption, for eating patterns established early in life tend to persist into adulthood. Despite this, the factors that facilitate or inhibit parents’ capacity to socialise fruit and vegetable consumption into their children’s daily diets remain poorly defined. Thirty-eight semi-structured interviews with residents, allied healthcare professionals, community leaders, community programme leaders and a local government leader living or working in two low socioeconomic suburbs were consequently conducted to ascertain factors exogenous and endogenous to the family unit that shaped parental food socialisation practices. Budgetary and time constraints emerged as exogenous factors that constrained fruit and vegetable socialisation. Constraining effects were also found for a range of endogenous factors, including commensal experiences, children’s food fussiness and the feeding styles employed by parents. As such, while many caregivers may wish to socialise fruit and vegetable consumption into their children’s daily diets, their capacity to do so is often inhibited by factors beyond their volitional control. Failure to take heed of these factors could therefore result in the development of social marketing campaigns that are ineffective at best or give rise to unintentionally harmful outcomes at worst.  相似文献   
1000.
This article explores the use of alternative payment mechanisms to overcome the holdout problem when multiple parcels of land must be acquired to complete a real‐estate development project. Purchase offers contingent upon successful land aggregation are compared to combination offers containing both guaranteed and contingent payments to determine which approach better mitigates holdout. The distribution of gains between developers and landowners is also examined. The results of a series of economic experiments suggest that contingent offers expedite land aggregation but developer payoffs are higher when combination offers are used. The results offer insight to real‐estate developers participating in land aggregation and inform government entities considering the necessity of public‐sector intervention in real‐estate markets to encourage desired development projects.  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