全文获取类型
收费全文 | 6579篇 |
免费 | 180篇 |
专业分类
财政金融 | 1472篇 |
工业经济 | 499篇 |
计划管理 | 1093篇 |
经济学 | 1389篇 |
综合类 | 117篇 |
运输经济 | 49篇 |
旅游经济 | 139篇 |
贸易经济 | 1114篇 |
农业经济 | 301篇 |
经济概况 | 584篇 |
邮电经济 | 2篇 |
出版年
2023年 | 32篇 |
2021年 | 50篇 |
2020年 | 103篇 |
2019年 | 114篇 |
2018年 | 139篇 |
2017年 | 145篇 |
2016年 | 140篇 |
2015年 | 107篇 |
2014年 | 145篇 |
2013年 | 836篇 |
2012年 | 182篇 |
2011年 | 233篇 |
2010年 | 188篇 |
2009年 | 233篇 |
2008年 | 212篇 |
2007年 | 201篇 |
2006年 | 161篇 |
2005年 | 165篇 |
2004年 | 144篇 |
2003年 | 184篇 |
2002年 | 159篇 |
2001年 | 135篇 |
2000年 | 147篇 |
1999年 | 142篇 |
1998年 | 162篇 |
1997年 | 132篇 |
1996年 | 107篇 |
1995年 | 120篇 |
1994年 | 105篇 |
1993年 | 89篇 |
1992年 | 83篇 |
1991年 | 93篇 |
1990年 | 73篇 |
1989年 | 67篇 |
1988年 | 65篇 |
1987年 | 60篇 |
1986年 | 72篇 |
1985年 | 112篇 |
1984年 | 112篇 |
1983年 | 106篇 |
1982年 | 89篇 |
1981年 | 86篇 |
1980年 | 83篇 |
1979年 | 77篇 |
1978年 | 81篇 |
1977年 | 76篇 |
1976年 | 75篇 |
1975年 | 60篇 |
1974年 | 63篇 |
1973年 | 41篇 |
排序方式: 共有6759条查询结果,搜索用时 140 毫秒
1.
Are farmers better stewards of the land they own than the land they rent from others? We answer this question using a data set that identifies Ontario farmers’ conservation practices on their own land as well as the land they rent. Using a fixed‐effects regression approach, we find that the role of tenure varies for different types of conservation practices. Farmers were found to be just as likely to adopt a machinery‐related practice such as conservation tillage on their rented land as that land which they own. On the other hand, farmers were found to be less likely to adopt site‐specific conservation practices such as planting cover crops on rented land. However, this effect diminishes as the expected length of the rental relationship increases when the landlord has a farming background. 相似文献
2.
Gregory Brown Robert Harris Wendy Hu Tim Jenkinson Steven N. Kaplan David T. Robinson 《Journal of Financial Economics》2021,139(2):561-577
Private equity performance, both for buyouts and venture capital, has been highly cyclical: periods of high fundraising have been followed by periods of low performance. Despite this seemingly predictable variation, we find modest gains, at best, to pursuing realistic, investable strategies that time capital commitments to private equity. This occurs, in part, because investors can only time their commitments to funds; they cannot time when commitments are called or when investments are exited. There is a high degree of time-series correlation in net cash flows even across commitment strategies that allocate capital in a very different manner over time. 相似文献
3.
4.
Farmers in the Vietnamese Mekong Delta face a wide range of climate-related and hydrological factors which threaten rice production. Smallholder farmers must adapt to climate change to sustain rice production as their central and most important livelihood activity. A sample was stratified across agro-ecological areas in the Delta affected by flooding, alluvial soils, acid sulphate soils, and saline water intrusion and by derived farmer typologies. A rural livelihoods approach was used in focus group discussions and in-depth interviews to identify and enumerate enabling and constraining adaptation factors. Smallholders experienced diverse natural hazards such as floods, abnormal rains, high temperatures, water scarcity, and salinity intrusion specific to the agro-ecological areas. Adaptation was constrained by labour shortages, water quality, topography, access to combine harvesters, transportation infrastructure, dryers and household savings. Adaptation was enabled by farming techniques and experience, cooperative groups, water quantity, access to information, and ability to purchase agro-chemicals through credit. Small farmers (< 1?ha) were more constrained than large farmers (> 1?ha) who had an expanded livelihood asset base. A range of policy implications are discussed, but adaptation is not just about technological fixes but requires overall improvements in a range of human, social and financial components. 相似文献
5.
James L. Chan 《公共资金与管理》2019,39(1):64-69
China’s reform on central–local fiscal reform has slowed down in recent years. The appointment of a new finance minister experienced in local government affairs is expected to renew the reform affirmed by the Chinese Communist Party (CCP) congress in late 2017. China has unprecedentedly identified a comprehensive list of 81 national basic public services as entitlements. Eighteen of them are subject to national and local standards, and co-financed by central and local governments. A new cost-sharing method for 10 of these services classifies sub-national jurisdictions into five tiers, in which the central government’s share declines from 80% to 10%. These measures, effective in 2019, aim at creating a ‘harmonious and moderately prosperous society’. 相似文献
6.
Quality & Quantity - This article discusses a regularity theory of causality (RTC) for the social sciences. With RTC, causality is a relationship between X and Y characterized by three... 相似文献
7.
8.
When evaluating mutually exclusive projects of unequal lives and with differing risk, standard approaches such as the constant chain of replacement, lowest common multiple and equivalent annual value techniques are usually applied. In using these techniques to rank projects, a critical issue is the manner in which uncertainty in the cashflows is resolved through time. We explore the applicability of net present value techniques to the problem of valuing assets with unequal lives, emphasising the use of equivalent annual value and lowest common multiple methods, and the correct choice of discount rate. Our results have direct application to practical capital budgeting problems such as choosing the optimum lifespan for a single asset, choosing between assets with different lifespans, and deciding whether to "run an asset for another year". 相似文献
9.
Rong Fan Joseph G. Haubrich Peter Ritchken James B. Thomson 《Journal of Financial Services Research》2003,24(2-3):149-179
Recent advances in asset pricing—the reduced-form approach to pricing risky debt and derivatives—are used to quantitatively evaluate several proposals for mandatory bank issue of subordinated debt. We find that credit spreads on both fixed- and floating-rate subordinated debt provide relatively clean signals of bank risk and are not unduly influenced by nonrisk factors. Fixed-rate debt with a put is unacceptable, but making the putable debt floating resolves most problems. Our approach also helps to clarify several different notions of “bank risk.” 相似文献
10.