全文获取类型
收费全文 | 1385篇 |
免费 | 57篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 161篇 |
工业经济 | 98篇 |
计划管理 | 276篇 |
经济学 | 284篇 |
综合类 | 114篇 |
运输经济 | 5篇 |
旅游经济 | 5篇 |
贸易经济 | 202篇 |
农业经济 | 72篇 |
经济概况 | 226篇 |
邮电经济 | 1篇 |
出版年
2024年 | 2篇 |
2023年 | 12篇 |
2022年 | 27篇 |
2021年 | 42篇 |
2020年 | 29篇 |
2019年 | 15篇 |
2018年 | 12篇 |
2017年 | 34篇 |
2016年 | 17篇 |
2015年 | 37篇 |
2014年 | 41篇 |
2013年 | 64篇 |
2012年 | 97篇 |
2011年 | 161篇 |
2010年 | 149篇 |
2009年 | 103篇 |
2008年 | 113篇 |
2007年 | 102篇 |
2006年 | 112篇 |
2005年 | 107篇 |
2004年 | 30篇 |
2003年 | 36篇 |
2002年 | 35篇 |
2001年 | 31篇 |
2000年 | 12篇 |
1999年 | 8篇 |
1998年 | 9篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
排序方式: 共有1444条查询结果,搜索用时 15 毫秒
211.
Gong Liming 《中国对外贸易(英文版)》2007,(22):12
On November 5,the State Council made public the new paid-time-off (PTO) regulations in order to get some feedback.As a result,"PTO"has become the most searched keyword in China; shortly after the announcement more than 140,000 people had participated in a survey on Sina.com,with nearly 60% showing their support of the new poli- cies. 相似文献
212.
213.
通过计算NU值,对新疆城镇化和工业化的发展水平进行了实证分析,得出新疆城镇化滞后于工业化发展水平的结论,并以此为基础分析这种现象带来的各种问题,并提出相应的解决对策. 相似文献
214.
We examine time‐series features of stock returns and volatility, as well as the relation between return and volatility in four of China's stock exchanges. Variance ratio tests reject the hypothesis that stock returns follow a random walk. We find evidence of long memory of returns. Application of GARCH and EGARCH models provides strong evidence of time‐varying volatility and shows volatility is highly persistent and predictable. The results of GARCH‐M do not show any relation between expected returns and expected risk. Daily trading volume used as a proxy for information arrival time has no significant explanatory power for the conditional volatility of daily returns. JEL classification: G15 相似文献
215.
引言
健康是社会发展的基石,也是社会发展的目标.关注健康与发展已经成为全球共同的趋势.党的十六大报告提出了全面建设小康社会的新发展目标,并将"提高全民族的健康素质"作为建设小康社会的重要内容.在过去的半个世纪里,我国的经济、社会、人口和健康模式发生了重大的变化,同时城乡在各个方面发展的差异也日益凸现.目前,农村的人口和健康问题已经成为政府和学术界关注的重点.投资于农村人口健康、改善农村的卫生条件已经成为21世纪我国政府的重大决策. 相似文献
216.
即墨市地处胶东半岛,东濒黄海,南依崂山,近邻青岛,西部联袂平度、胶州,北与莱西毗邻,素有“青岛后院”和“胶东咽喉”之称。纵横交错、四通八达的公路网为即墨市经济的发展和繁荣铺就了金光大道。即墨市公路管理局是承担即墨市公路建设任务的重要职能部门。几年来,在中共即墨市委、市政府和上级主管部门的正确领导下,在加快发展的实践中,即墨公路人用智慧和汗水,谱写了公路建设的新华章,在构建和谐社会的事业中,即墨公路人用机敏和勤奋,铸就了千年古城的新辉煌。 相似文献
217.
218.
Peichen Gong 《Journal of Forest Economics》2003,9(3):241-243
Ashgate Publishing Limited, Gower House, Croft Road, Aldershot, Hants GU11 3HR, England (www.ashgate.com). 498 p. £ 100.00. ISBN 0-7546-2237-1 (hardback).Being one volume in the series of the International Library of Environmental Economics and Policy (T. Tietenberg and W. Morrison, gen. eds.), this book is a collection of some of the most significant journal essays in forest economics and forest policy. In compiling this volume, Roger Sedjo did a great service to the forest economics profession.This volume includes twenty-five essays originally published between 1849 and 1996 in a dozen journals, and one chapter from the Third Assessment Report of the International Panel on Climate Change (IPCC, 2001) which addresses the biological sequestration of carbon in terrestrial ecosystems. These are organized into four parts: the harvest rotation issue, timber supply, multiple-use and non-timber outputs, and global issues. An introduction essay to this volume, written by the editor, provides an overview of the major issues in forest resource management and discusses some the most important contributions to the forest economics literature.The eleven essays in the first part of the book provide a rather complete coverage of the most important contributions to the literature on optimal rotation age, which is a fundamental issue in forest management and forestry investment. Four of the essays (Faustmann 1849, Ohlin 1921, Bentley and Teeguarden 1965, and Samuelson 1976) address the basic formulation and interpretation of the optimal rotation model. Four essays (Löfgren 1985, Newman, Gilbert and Hyde 1985, Reed 1984, and Brazee and Mendelsohn 1988) extend the basic rotation model to examine the rotation age decision in the presence of deterministic trends and uncertainty in timber yield and price, respectively. Based on the Faustamnn rotation model, Klemperer (1976) and Chang (1982) examine the impacts of taxation on forest value and on the optimal rotation age. Koskela (1989) provides a detailed analysis of the impacts of taxation on timber harvest decisions under price uncertainty. What I feel missing in this part is a comparative statics analysis examining the impacts of changing economic parameters on the optimal rotation age.Part II includes five essays on economic analysis of long-run timber supply. Clawson (1979) reviews the historical development of forest resource and forest utilization in the United States. Vaux (1973) examines the long-run potential supply of timber from forest plantations in California. Berck (1979) investigates the difference in harvesting behavior between private forest owners and public managers. Lyon (1981) and Lyon and Sedjo (1983) examine the optimal exploitation of old-growth natural forests and the transition to steady state. While these essays all focus on the long-run timber supply in the United States, the methods developed and used in these papers could be applied for any other region. The exploitation of old-growth natural forests and the long-term availability of timber have been without doubt two major concerns in the United States. In many parts of the world, however, concerns about timber supply in the short-run have also had great influences on the development of forest policy. It would have been appreciated if a couple of essays addressing the short-run supply of timber had been included.Part III contains three essays dealing with the problem of multiple-use forest management. Gregory (1955) develops an economic framework for multiple-use management based joint production theory. Hartman (1976) examines the multiple-use rotation age decision. Swallow, Parks and Wear (1990) investigate the problem of non-convexities involved in multiple-use rotation age decisions. The merits of these essays lie in that they use rather simple models to demonstrate the importance of incorporating non-timber benefits in forestry decisions and the complexities of the multiple-use problem. In his 1976 essay, Hartman points out that in many situations management practices applied to one stand affect the value of non-timber outputs derived from the adjacent stands; such interdependence needs to be incorporated into multiple-use decision analysis. I certainly would like to find in this volume one or two essays examining the impacts of stand interdependence on the optimal decision. Another important issue in multiple-use management, which is not covered in this volume either, is the valuation of non-market priced outputs and services. Yet I believe that this omission is well motivated, for there are two separate volumes in this series devoted to non-market valuation methods (R. T. Carson, ed. Direct Environmental Valuation Methods, Volumes I and II).The seven essays in Part IV deal with a set of forest economic and policy issues related to global warming and biodiversity conservation. Parks and Hardie (1995) examine the cost-effective subsidies to convert marginal agricultural land to forests for the purpose of carbon sequestration. Hoen and Solberg (1993) analyze the potential and cost-effectiveness of increasing carbon sequestration in existing forests by changing forestry practices. van Kooten, Binkley and Delcourt (1995) examine the effect of carbon taxes and subsidies on the optimal rotation age. The chapter from the Third Assessment Report of IPCC (2001) provides a comprehensive review of the literature on the ecological, environmental, social and economic aspects of carbon sequestration in terrestrial ecosystems. While forests and forest management could play an important role in mitigating climate change, increasing level of atmospheric dioxide and climate change would inevitably affect the productivity of forest ecosystems, thereby could have significant impacts on future timber growth, harvest and inventory as well as carbon storage in forest ecosystems. Joyce et al. (1995) present a framework for analyzing the potential effects of climate change on the forest sector. The remaining two essays in this part examine the costs and benefits of biodiversity preservation, respectively. Montgomery, Brown and Adams (1994) estimate the marginal cost of preserving the northern spotted owl. Simpson, Sedjo and Reid (1996) examine the expected value of the marginal species as an input to pharmaceuticals.The editor points out in the introduction chapter that there are many other important contributions that are not included in this volume, some of these are mentioned, others not. In addition to the few omissions noted earlier, several important economic and policy issues such as uneven-aged stand management, deforestation, international trade, sustainable forestry, forest recreation, wildlife management and so on are not discussed. Moreover, none of the journal essays published since 1997 is selected. That there are many other important contributions does not mean the essays included in this volume are less important, however. While each forest economist may present a different list of the most important papers, most (if not all) of the essays in this volume would appear on anyone's list. I strongly recommend this book for research scientists and graduate students of forest economics as an essential addition to their reference library. 相似文献
219.
宫小芳 《内蒙古财经学院学报(综合版)》2011,9(3):146-148
本文根据积分上限函数的性质利用微分中值定理证明了积分第一中值定理,用改进的介值定理证明了ξ∈(a,b),并推广了积分第一中值定理。 相似文献
220.
市场营销是企业的整个经济活动过程,是企业经营发展的终点,也是起点。它包括产品开发、定价、分销渠道、售后服务及意见反馈等等。企业要成功的销售产品,向社会提供服务,满足社会需求,就必须通过市场营销活动,生产适销对路的产品,保证优秀的产品,制定合理的产品价格,进行充分的 相似文献