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51.
We analyse the state of the art in the field of life cycle portfolio choice, a recent strand of the literature on intertemporal
portfolio selection. Life cycle models are designed to identify optimal savings and portfolio policies over the lifetime of
investors. They can help to improve pension schemes by showing how these could be specifically tailored to the individual
employee’s circumstances to overcome the ‘one-size-fits-all’ philosophy still prevailing in parts of the mandatory retirement
savings system. To facilitate comparison, we first describe set-up, solution method and characteristic results for a basic
model and then derive a general framework to classify existing contributions. We highlight the models’ strengths and weaknesses
and assess their ability to resolve existing portfolio puzzles. Lessons from the literature are summarized and promising areas
for further research identified.
JEL classifications G11, D14, D91, H55 相似文献
52.
国际收支平衡表不仅综合记载了一国在一定时期内与世界各国的经济往来的情况和在世界经济中的地位及其消长对比情况,而且还集中反映了该国的经济类型和经济结构。2005年,中国的国际收支巨额顺差,具有鲜明特色.透过国际收支平衡表,可以发现中国国际收支的结构特征、问题所在,进而提出改进措施和政策建议。 相似文献
53.
Robert U. Ayres 《Environmental and Resource Economics》1995,6(3):207-230
Economists are increasingly interested in forecasting future costs and benefits of policies for dealing with materials/energy fluxes, polluting emissions and environmental impacts on various scales, from sectoral to global. Computable general equilibrium (CGE) models are currently popular because they project demand and industrial structure into the future, along an equilibrium path. But they are applicable only to the extent that structural changes occur in or near equilibrium, independent of radical technological (or social) change. The alternative tool for analyzing economic implications of scenario assumptions is to use Leontief-type Input-Output (I-O) models. I-O models are unable to endogenize structural shifts (changing I-O coefficients). However, this can be a virtue when considering radical rather than incremental shifts. Postulated I-O tables can be used independently to check the internal consistency of scenarios. Or I-O models can be used to generate scenarios by linking them to econometric macro-drivers (which can, in principle, be CGE models). Explicit process analysis can be integrated, in principle, with I-O models. This hybrid scheme provides a natural means of satisfying physical constraints, especially the first and second laws of thermodynamics. This is important, to avoid constructing scenarios based on physically impossible processes. Process analysis is really the only available tool for constructing physically plausible alternative future I-O tables, and generating materials/energy and waste emissions coefficients. Explicit process analysis also helps avoid several problems characteristic of pure CGE or I-O models, viz. (1) aggregation errors (2) inability to handle arbitrary combinations of co-product and co-input relationships and (3) inability to reflect certain non-linearities such as internal feedback loops. 相似文献
54.
Douglas C. A. Taylor Jessica L. Abel Jalpa A. Doshi Breanna Essoi Stephanie Korrer 《Journal of medical economics》2020,23(10):1072-1083
Abstract
Aims
To characterize a US population of patients with irritable bowel syndrome with constipation (IBS-C) or chronic idiopathic constipation (CIC) using CONTOR, a real-world longitudinal research platform that deterministically linked administrative claims data with patient-reported outcomes data among patients with these conditions. 相似文献55.
企业研究与开发绩效评价:现状分析及改进思路 总被引:1,自引:0,他引:1
由于研发活动固有的特点,企业研究与开发(以下也称研发或R&D)的绩效评价一直是理论和实践上的难题。通过分析影响企业研发绩效评价因素,探讨现行的企业绩效评价体系存在的问题,得出了可以利用平衡计分卡设计企业研发绩效评价指标体系的结论。 相似文献
56.
57.
消费品市场有效供给不足的成因及对策 总被引:2,自引:0,他引:2
刘天祥 《西安财经学院学报》2002,15(3):27-29
在买方市场条件下 ,我国消费品市场有效供给不足表现为 :消费品市场上的商品价位与消费者的市场收入层次错位、名优品牌和知名品牌商品少、城乡消费鸿沟加深。造成消费品市场有效供给不足的原因是 :消费品生产的市场定位出现误差、生产技术含量低、市场营销能力不强等。要达到消费品市场均衡 ,必须要做好市场定位、提高产品的技术含量、推进名牌战略、降低经营成本 相似文献
58.
This paper contrasts real effective exchange rate (REER) measures based on different deflators (consumer price index, GDP deflator, and unit labor cost) and discusses potential implications for the link—or lack thereof—between the REER and the external balance. We begin by comparing the evolution of different measures of REER to confirm that the choice of deflator plays a significant role in REER movements. A subsequent empirical investigation based on 35 developed and emerging market economies over 1995–2017 yields comprehensive and robust evidence that only the REER deflated by unit labor cost exhibits contemporaneous patterns consistent with the expenditure-switching mechanism. Finally, we show that a standard open-economy model with nominal rigidities and trade in intermediate goods is able to generate these aforementioned patterns. 相似文献
59.
Ragnar Norberg 《Finance and Stochastics》2005,9(4):519-537
60.
论养老基金平衡机制--基于辽宁试点模式对养老基金平衡的透视 总被引:3,自引:0,他引:3
张松 《中央财经大学学报》2003,(1):25-28
我国处于转轨中的养老模式面临着人口老龄化和转轨成本的双重压力,为此,2001年7月开始在辽宁省进行社保改革试点。本将以试点模式为研究起点,并将养老基金平衡剖析为两个收支平衡:一是横向平衡,二是纵向平衡。就横向平衡而言,笔认为难关的突破在于强化政府的社会保险责任,而纵向平衡的难关在于基金收益率。为此,本提出一些拓展性的社保改革思路,并认为在此基础之上养老基金的平衡是可以实现的。 相似文献