全文获取类型
收费全文 | 5519篇 |
免费 | 141篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 1214篇 |
工业经济 | 467篇 |
计划管理 | 940篇 |
经济学 | 1046篇 |
综合类 | 80篇 |
运输经济 | 46篇 |
旅游经济 | 84篇 |
贸易经济 | 978篇 |
农业经济 | 304篇 |
经济概况 | 500篇 |
邮电经济 | 2篇 |
出版年
2021年 | 29篇 |
2020年 | 69篇 |
2019年 | 87篇 |
2018年 | 99篇 |
2017年 | 96篇 |
2016年 | 110篇 |
2015年 | 66篇 |
2014年 | 110篇 |
2013年 | 645篇 |
2012年 | 165篇 |
2011年 | 176篇 |
2010年 | 155篇 |
2009年 | 176篇 |
2008年 | 182篇 |
2007年 | 160篇 |
2006年 | 167篇 |
2005年 | 138篇 |
2004年 | 137篇 |
2003年 | 147篇 |
2002年 | 169篇 |
2001年 | 134篇 |
2000年 | 116篇 |
1999年 | 135篇 |
1998年 | 106篇 |
1997年 | 107篇 |
1996年 | 100篇 |
1995年 | 96篇 |
1994年 | 82篇 |
1993年 | 86篇 |
1992年 | 79篇 |
1991年 | 69篇 |
1990年 | 69篇 |
1989年 | 66篇 |
1988年 | 68篇 |
1987年 | 64篇 |
1986年 | 77篇 |
1985年 | 98篇 |
1984年 | 92篇 |
1983年 | 89篇 |
1982年 | 74篇 |
1981年 | 79篇 |
1980年 | 79篇 |
1979年 | 62篇 |
1978年 | 72篇 |
1977年 | 84篇 |
1976年 | 46篇 |
1975年 | 49篇 |
1974年 | 56篇 |
1973年 | 40篇 |
1972年 | 30篇 |
排序方式: 共有5661条查询结果,搜索用时 15 毫秒
951.
Lee-Ann Sutherland Doreen GabrielLaura Hathaway-Jenkins Unai Pascual Ulrich SchmutzDan Rigby Richard GodwinSteven M. Sait Ruben SakrabaniWilliam E. Kunin Tim G. BentonSigrid Stagl 《Land use policy》2012,29(3):502-512
In this paper we present a multi-disciplinary analysis of the potential impacts of undertaking similar environmental actions on multiple farms in a small geographic area, using organic farming as a proxy for a co-ordinated approach. Recent papers have called for more co-ordinated efforts between farmers in terms of their environmental actions, but there has been limited applied research demonstrating the environmental benefits or the economic and social implications to farmers of this approach. Comparative analysis of biodiversity, soil and water, and farm profitability were undertaken in England on 32 matched farms in areas of low and high organic farming concentration; qualitative interviews were also conducted with 48 farmers living in two of the eight areas. Findings demonstrate higher overall levels of biodiversity on organic farms (particularly in “hotspot” areas) but this was not universal across the species groups investigated. Higher water infiltration rates were found in organic grasslands, which could prove to be a useful measure to combat flooding. In terms of the technical efficiency of producing these environmental gains, conventional and organic farms in hotspot areas demonstrated equivalent efficiency from a financial perspective. Socio-cultural research identified the different amounts of trust farmers have in their neighbours, based in part on their performance as ‘good farmers’. We discuss the neighbourhood effect with a multi-disciplinary approach and conclude that encouraging local farmer co-ordination can have clear environmental benefits without high economic cost, but must be undertaken with caution - specifically regarding the trade-offs between benefits, local geophysical and social characteristics, and assumptions made about inter-farmer trust. 相似文献
952.
Matzopoulos R Peden M Bradshaw D Jordaan E 《International journal of injury control and safety promotion》2006,13(2):81-88
Railway fatalities account for approximately 10% of transport fatalities in Cape Town. The objective of this study was to examine alcohol intoxication as a risk factor during daylight hours by conducting a case - control study to compare rail passenger and pedestrian fatalities (cases) with motor vehicle passenger and pedestrian fatalities (controls). Rail passenger and rail pedestrian fatalities were defined as cases with motor vehicle passenger and pedestrian fatalities as the respective controls. Data were collected from post-mortem reports at two mortuaries from 1994 to 1996. Blood alcohol concentration was the dependent variable. The independent variables were age, gender, date of death, day of week, time of injury and external cause of death. The late afternoon and early evening period from 1600 hours to 1900 hours had the highest frequency of fatalities for all case and control groups. Of the 56 predominately male (89%) railway passenger cases with an average age of 34.5 (SD 12.5) years, Friday (27%) was the most frequent day of death. Railway pedestrian cases (89% male, average age 36.8 years (SD 13.3)) were more likely to be killed on a Monday (11% of cases). Among the controls, motor vehicle passengers (63% male, average age 39.9 (SD 15.5)) were more likely to die on a Sunday (25%) and pedestrians (82% male, average age 41 (SD 14.7)) on a Saturday (21%). The study showed that alcohol consumption is an important risk factor for rail fatalities during daylight hours, with rail passenger fatalities being 4.71 (1.72 - 12.88) and rail pedestrian fatalities 1.62 (0.98 - 2.69) times more likely to be intoxicated than the respective controls. The results provide more evidence for public health campaigners to tackle endemic alcohol abuse and to develop diverse interventions that do not exclusively target motor vehicle drivers. 相似文献
953.
Richard Schiere 《Revue africaine de developpement》2010,22(Z1):615-628
Abstract: China's relationship with Africa has grown exponentially over the last decade with US$95 billion in bilateral trade in 2008 and US$5.4 billion of Chinese investment in Africa for the same year. The growth of Sino‐African relations also has an impact on the role of traditional development partners in Africa in particular in the aftermath of the 2008 financial crisis, which has already led some traditional development partners to reduce their aid budgets and subsequently their Official Development Assistance (ODA) flows to Africa. The objective of this paper is to analyse different development cooperation modalities in Africa of traditional development partners and China. This requires identifying trends in aid, debt relief, general budget support, trade, preferential trade access, and investment flows of both traditional development partners and China. The paper advocates that complementarities can be built between these development modalities on a national, regional and global level. This would enhance development effectiveness, increase efficiency and create win‐win situations which would be beneficial to African countries, China and traditional development partners. 相似文献
954.
Corporate social responsibility (CSR) has attracted wider research interests over recent decades. While some studies have examined the impact of CSR activities on firm competitive advantage (CA), the findings so far remain contradictory. Moreover, the role of export orientation, firm strategy, and structure on the association between CSR and CA has not been explicitly examined. Thus, the purpose of this study is to examine the moderating role of export orientation, firm strategy, structure, and firm size on the association between CSR and CA. Using a sample of 179 responses from management staff in organizations across five sectors in a developing country context of Ghana, the study found positive effects of CSR on CA. The study contributes to the resource‐based view (RBV) scholarship by confirming the important complementary effect of export orientation and organizational structure as important resources and capabilities on the CSR–competitiveness relationship. However, no evidence of a moderating effect of firm strategy, or firm size on the CSR–CA relationship was found. These findings are instructive, impactful, and enrich the existing literature on CSR and strategy. Implications for theory and practice are also discussed. 相似文献
955.
This study reviewed the research on international joint ventures (IJVs) in Africa up to 2017. The authors performed a systematic search of peer‐reviewed good‐quality research using the 6W procedure and ensured the quality of the review by using the 5Cs quality criteria. The content analysis was focused on four research questions. A total of 22 relevant studies were found. Overall, only about one‐third of the lead authors were affiliated with African universities. A majority of the studies were quantitative, and 78% of the studies were done for three countries: Ghana, Morocco, and Nigeria. There was either just one or no study on trust and conflict, partner selection, and human resource management (HRM). At the contextual level, it seems the most important factor influencing IJV strategy and success is institutions. We therefore suggest a greater use of institutional theory. Finally, we present a summary of conceptual framework and four propositions to guide future research. 相似文献
956.
957.
ABSTRACTA key question for promoting international competition is how to improve the position of countries and industries in global value chains (GVCs). The first step is to properly measure industrial upgrading in GVCs. This is not a trivial issue because upgrading has not been defined unambiguously. Several authors have used different (and sometimes related) measures, all of which indicate certain aspects of upgrading. Rather than trying to find the single, ultimate measure of upgrading, we propose a different approach. We examine the multidimensionality of industrial upgrading, using eight indicators in factor analysis. Four of the eight indicators adopt the GVC perspective and include, for example, the growth of the share in value-added exports. We provide three quantitative dimensions of industrial upgrading: process upgrading, product upgrading, and skill upgrading. With these dimensions, we compare and analyze the upgrading of different countries and industries using the World Input–Output Database. 相似文献
958.
Elkhan Richard Sadik‐Zada 《Review of Development Economics》2021,25(1):381-404
The present inquiry focuses on the modernization perspectives of the commodity‐exporting countries through the lens of development economics. To this end, the study adopts the Kaldorian framework to address the modernization effects, epitomized in the absorption of surplus labor. To trace the process of economic modernization, the study augments Lewis’s dualistic economy model by the extractive sector. Three different scenarios for the management of resource revenues are scrutinized. An altruistic mode, which implies a pure redistribution of the revenues among the poor swaths of the population, protracts the process of economic modernization, requires a greater amount of capital stock, and harbors a greater risk of a poverty trap. This effect is less pronounced if the modern sector is more capital‐intensive. A productive mode, which elicits full reinvestment of the commodity revenues, in contrast, accelerates the pace of economic modernization. Further, predicated on the scrutiny of a more realistic scenario, a bargaining mode, the study derives the condition for a net positive (or negative) modernization effect. The study identifies technical progress alongside capital accumulation as a further important source of economic modernization. 相似文献
959.
Richard T. Gudaj Fujin Yi Svetlana Mishchuk Tatiana A. Potenko Ivan Zuenko Zvi Lerman 《American journal of economics and sociology》2020,79(5):1417-1454
Chinese originally migrated to the Russian Far East (RFE) to fill a labor shortage on collective farms. In more recent decades, some Chinese migrants have chosen to lease land from Russian farmers to manage their own farms. Rising soybean prices and the trade war between China and the United States have increased demand for land capable of producing soybeans. Thus, Chinese farmers in the RFE compete for land with Russians. The Chinese also contribute positively to local food security by increasing food availability and accessibility. This study uses an econometric model to analyze the impact of Chinese on local land markets in the RFE. Financial support for Russian farmers by the government depresses their demand for land; rising soybean prices and the employment of Chinese farm workers by Russian farmers encourage farm expansion, resulting in higher land prices. Selling farm produce to Chinese merchants increases the amount of land owned, cultivated, and rented by Russian farmers. 相似文献
960.