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   694篇
  免费   11篇
财政金融   149篇
工业经济   52篇
计划管理   96篇
经济学   143篇
综合类   21篇
运输经济   16篇
旅游经济   25篇
贸易经济   98篇
农业经济   28篇
经济概况   42篇
水利工程   35篇
  2021年   3篇
  2020年   6篇
  2019年   6篇
  2018年   9篇
  2017年   13篇
  2016年   18篇
  2015年   8篇
  2014年   18篇
  2013年   68篇
  2012年   23篇
  2011年   18篇
  2010年   24篇
  2009年   24篇
  2008年   15篇
  2007年   19篇
  2006年   20篇
  2005年   13篇
  2004年   20篇
  2003年   32篇
  2002年   21篇
  2001年   20篇
  2000年   13篇
  1999年   14篇
  1998年   20篇
  1997年   15篇
  1996年   15篇
  1995年   7篇
  1994年   8篇
  1993年   13篇
  1992年   8篇
  1991年   13篇
  1990年   14篇
  1989年   14篇
  1988年   7篇
  1987年   9篇
  1986年   8篇
  1985年   18篇
  1984年   15篇
  1983年   16篇
  1982年   9篇
  1981年   14篇
  1980年   6篇
  1979年   4篇
  1978年   10篇
  1977年   13篇
  1976年   3篇
  1975年   7篇
  1974年   3篇
  1973年   3篇
  1971年   3篇
排序方式: 共有705条查询结果,搜索用时 8 毫秒
151.
Canada's approach to stabilization of the livestock industry differs from stabilization programs analyzed in recent economic literature. In theory, the Canadian approach results in net economic benefits to society. Empirical analysis of pork stabilization indicates the potential magnitude of net benefits and shows that alternative programs have different stabilizing characteristics.
L'approche Canadienne de stabilisation de la production animate diffère des programmes de stabilisation présentés récement dans la littérature économique. En théory l'approche Canadienne se traduit par un gain net au profit de la société. L'analyse empirique de la stabilisation du marché porcin indique l'eventail possible des gains net et montre que des variantes du programme ont diverses characteristiques de stabilisation.  相似文献   
152.
Demographers emphasize decreased mortality and “economic development” as the main contributors generating the demographic transition. Contrary to previous findings, we show that simple dynastic models à la Barro–Becker can reproduce observed changes in fertility in response to decreased mortality and increased productivity growth if the intertemporal elasticity of substitution is low enough. We show that this is largely due to number and welfare of children being substitutes in the utility of parents in this case. We find that with an IES of one‐third, model predictions of changes in fertility amount to two‐thirds of those observed in U.S. data since 1800.  相似文献   
153.
Although standard theories suggest that patent protection helps stimulate innovative activities, some new theories argue the opposite. Empirical studies do not generate conclusive results either. This paper investigates empirically the impacts of foreign patent reforms on innovation in the US, using data on successful patent applications in the US over 33 years and major IPR reforms in 21 countries, in addition to the patent reforms in the US and the TRIPS Agreement of the WTO. We find that the TRIPS Agreement has had significant impacts on innovation in the US, which highlights the importance of international cooperation in patent protection. However, the effects of strengthening patent protection by individual countries are not statistically significant. This result seems to imply that the US market is already sufficiently large/profitable to provide innovation incentives in the US and therefore further strengthening foreign patent protection simply increases the US innovators' rent, but not their innovation.  相似文献   
154.
We use a Barro–Becker model of endogenous fertility, in which parents are subject to idiosyncratic shocks that are private information (either to labor productivity or taste for leisure), to study the efficient degree of consumption inequality in the long run. The planner uses the trade-off between family size and future consumption and leisure, to provide incentives for workers to reveal their shocks. We show that in this environment, the optimal dynamic contract no longer features immiseration in consumption. We also discuss the implications of the model on the long run properties of family size in the optimal contract and show that the long run trend in dynasty size can be either positive or negative depending on parameters.  相似文献   
155.
This paper derives the dynamic programming equation (DPE) to a differentiable Markov Perfect equilibrium in a problem with non-constant discounting and general functional forms. Beginning with a discrete stage model and taking the limit as the length of the stage goes to 0 leads to the DPE corresponding to the continuous time problem. The note discusses the multiplicity of equilibria under non-constant discounting, calculates the bounds of the set of candidate steady states, and Pareto ranks the equilibria.  相似文献   
156.
This article investigates the effects of a large-scale public sector employment quota policy for disadvantaged minorities (Scheduled Castes and Scheduled Tribes) in India on their occupational choices, as defined by skill level, during the 1980s and 1990s. We find that, first, the employment quota policy significantly affects the occupational structure of both disadvantaged minority populations. In response to the employment quotas, individuals belonging to the Scheduled Caste group are more likely to choose high-skill occupations and less likely to choose low- and middle-skill occupations, while individuals belonging to the Scheduled Tribe group are less likely to choose high-skill occupations and more likely to choose low- and middle-skill occupations. Second, the impact of the employment quotas is significantly related with an individual’s years of schooling. Overall, the results indicate that the employment quota policy changes the occupational choices of individuals within the targeted populations and contributes to their improved socio-economic standing.  相似文献   
157.
美国最大的有线电视公司康卡斯特(Comcast)收购NBC环球集团,卡夫食品(KraftFoods)竞购巧克力商吉百利(Cadbury),惠普收购网络软件及设备生产商3Com公司.谷歌兼并手机广告公司AdMob……所有这些如火如荼的企业兼并行为都在向我们暗示:一个崭新的并购时代呼啸而来。  相似文献   
158.
We consider a horizontally differentiated duopoly where consumers care about the product's “greenness.” Firms can be asymmetric: they may differ in the product's intrinsic value and may also differ in their chosen level of greenness. We examine the choice of greenness and the implications of various policy interventions. We show that (i) the choices of product greenness are strategic substitutes, (ii) the high‐intrinsic quality firm produces the greener product, (iii) the low‐quality firm's greenness may increase with the cost of its provision or decrease with consumer willingness to pay for it, (iv) a minimum quality standard (MQS) leads the greener firm to lower its environmental quality and can even reduce average quality, (v) greenness is underprovided even if consumers fully internalize the externality, and (v) an MQS can reduce welfare if the greenness of the high‐quality firm exceeds the MQS, even when environmental quality is underprovided. The effects of policy interventions on profits differ qualitatively across polices and firms: A firm that lobbies for one type of intervention may lobby against another similar one, and a firm may lobby for an intervention while its competitor may lobby against it. A subsidy for the development costs of a green product can financially hurt both firms.  相似文献   
159.
160.
Objectives:

This study evaluated the effect of paliperidone palmitate long-acting injectable (LAI) antipsychotic on recovery-oriented mental health outcomes from the perspective of healthcare providers and patients during the treatment of patients with schizophrenia or schizoaffective disorders.

Methods:

Archival data for patients with a primary diagnosis of schizophrenia or schizoaffective disorder receiving ≥6 months of paliperidone palmitate LAI were retrieved from the electronic medical records system at the Mental Health Center of Denver. Mental health recovery was assessed from both a provider’s (Recovery Markers Inventory [RMI]) and patient’s (Consumer Recovery Measure [CRM]) perspective. A three-level hierarchical linear model (HLM) was utilized to determine changes in CRM and RMI scores by including independent variables in the models: intercept, months from treatment (slope), treatment time period (pretreatment and treatment), age, gender, primary diagnosis, substance abuse diagnosis, concurrent medications, and adherence to paliperidone palmitate LAI.

Results:

A total of 219 patients were identified and included in the study. Results of the final three-level HLMs indicated an overall increase in CRM scores (p?<?0.05), an overall increase (p?<?0.01), and an increased rate of change (p?<?0.05) in RMI scores during the paliperidone palmitate LAI treatment period vs the pre-treatment period.

Limitations:

This study contained a retrospective, non-comparative design, and did not adjust for multiplicity

Conclusions:

The current study demonstrates that changes in recovery-oriented mental health outcomes can be detected following the administration of a specific antipsychotic treatment in persons with schizophrenia or schizoaffective disorders. Furthermore, patients receiving paliperidone palmitate LAI can effectively improve recovery-oriented outcomes, thereby supporting the drug’s use as schizophrenia treatment from a recovery-oriented perspective.  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