全文获取类型
收费全文 | 22662篇 |
免费 | 608篇 |
专业分类
财政金融 | 4030篇 |
工业经济 | 1609篇 |
计划管理 | 3922篇 |
经济学 | 5381篇 |
综合类 | 244篇 |
运输经济 | 176篇 |
旅游经济 | 341篇 |
贸易经济 | 3758篇 |
农业经济 | 1140篇 |
经济概况 | 2592篇 |
信息产业经济 | 3篇 |
邮电经济 | 74篇 |
出版年
2023年 | 108篇 |
2021年 | 149篇 |
2020年 | 283篇 |
2019年 | 453篇 |
2018年 | 497篇 |
2017年 | 525篇 |
2016年 | 514篇 |
2015年 | 351篇 |
2014年 | 562篇 |
2013年 | 2397篇 |
2012年 | 776篇 |
2011年 | 809篇 |
2010年 | 700篇 |
2009年 | 794篇 |
2008年 | 727篇 |
2007年 | 634篇 |
2006年 | 608篇 |
2005年 | 530篇 |
2004年 | 462篇 |
2003年 | 474篇 |
2002年 | 420篇 |
2001年 | 501篇 |
2000年 | 457篇 |
1999年 | 414篇 |
1998年 | 471篇 |
1997年 | 423篇 |
1996年 | 421篇 |
1995年 | 359篇 |
1994年 | 369篇 |
1993年 | 353篇 |
1992年 | 362篇 |
1991年 | 379篇 |
1990年 | 345篇 |
1989年 | 254篇 |
1988年 | 263篇 |
1987年 | 267篇 |
1986年 | 248篇 |
1985年 | 358篇 |
1984年 | 354篇 |
1983年 | 331篇 |
1982年 | 284篇 |
1981年 | 285篇 |
1980年 | 283篇 |
1979年 | 276篇 |
1978年 | 225篇 |
1977年 | 183篇 |
1976年 | 182篇 |
1975年 | 162篇 |
1974年 | 149篇 |
1973年 | 148篇 |
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
991.
This paper reviews the relationships between land use and climate change. It explores how land use decisions will be affected by future changes in the climate, but also the feedbacks from land use change to the global climate system through greenhouse gas (GHG) fluxes. Past changes in land use were characterised by decreasing areas of agricultural use and increasing areas of forested and urbanised land. This has led to UK land use being a net sink for GHGs, mostly due to forestation. However, existing forests have on average passed their age for maximum net removals of carbon from the atmosphere. In the next decade at least, net removals from UK forests are likely to decrease significantly.Longer term scenarios of future land use change are consistent in their expectation of further declines in the agricultural area used for food production – offset to some extent by increased bioenergy cropping – along with increases in forested and urban areas. These trends are broadly consistent with the observed past land use change, but are calculated from various assumptions about future changes in drivers rather than by extrapolation from the past. Socio-economic and technological changes are likely to be the most important drivers for land use, with climate change having a smaller influence. The land use changes represented in these scenarios would likely reduce GHG emissions and enhance carbon sinks. These trends would be reinforced by small future changes in the climate, but large climatic changes are likely to cause net GHG fluxes to switch from being a sink to a source. Land use change will also be moderated by potential policy goals that seek to reduce GHG emissions from land and/or increase the size of land-based sinks. This includes strategies to reduce carbon and nitrogen emissions through increased efficiency, afforestation and biofuel production. 相似文献
992.
993.
Seonghee Cho Misty M. Johanson Priyanko Guchait 《International Journal of Hospitality Management》2009
The purpose of the study is to examine whether the predictors that decrease employee intention to leave will also increase employees’ intention to stay. Therefore, the objective of the study is twofold: (1) to examine the influence of perceived organizational support, perceived supervisors’ support, and organizational commitment regarding intent to leave and (2) to investigate the influence of the same variables on intent to stay. A total of 416 hospitality employees in the U.S. participated. The results suggest that perceived organizational support and organizational commitment decreased intent to leave while only perceived organizational support had a positive impact on intention to stay. Implications detail ways that hospitality organizations can focus on increasing their employees’ commitment through perceived organizational support as a critical component of turnover culture. 相似文献
994.
Airport stops and flights on small airplanes as inhibitors of tourism-related air travel: A case study 总被引:2,自引:0,他引:2
This article discusses the extent to which prospective tourists' concerns about airport stops and flights on small airplanes inhibit air travel to tourist destinations, drawing on data from telephone surveys conducted in the Dallas–Fort Worth, Texas area. Respondents were queried about the extent to which one airport stop, two airport stops, and one airport stop followed by a flight on a small, propeller-powered airplane, respectively, would deter them from flying to a destination 1096 miles (1764 km) away. Findings suggest that marketers of similar destinations in similarly distant markets that are accessible by air only after two airport stops risk having their promotional appeals ignored by roughly half those who would prefer to reach such destinations by air. Moreover, those most concerned about such flight schedules were more likely than other respondents to have high incomes and to use the Internet to obtain vacation or travel information. 相似文献
995.
Ines Engelmann M.A. 《Publizistik》2009,54(1):82-102
While framing theory is concerned with the way media content is presented, news bias theory concentrates on the evaluative aspect. The study integrates both approaches of news structuring. A detailed argument analysis of two German quality newspapers, Die Welt and Frankfurter Rundschau, representative for two opposite editorial viewpoints, was conducted to test the assumptions of both theories. The examination of news coverage related to the accession of Poland, Czech Republic, Bulgaria and Romania to the EU contradicts previous results of framing and news bias research. Apart from finding a pronounced focus on economical topics in both newspapers, they clearly differ in their frames of reference and political positions on the issues, staying in line with their editorial orientation. A comparison of the different accession times reveals a change in the frames of reference and the advocates of these frames. 相似文献
996.
Statistical Thinking in Empirical Enquiry 总被引:4,自引:0,他引:4
This paper discusses the thought processes involved in statistical problem solving in the broad sense from problem formulation to conclusions. It draws on the literature and in-depth interviews with statistics students and practising statisticians aimed at uncovering their statistical reasoning processes. From these interviews, a four-dimensional framework has been identified for statistical thinking in empirical enquiry. It includes an investigative cycle, an interrogative cycle, types of thinking and dispositions. We have begun to characterise these processes through models that can be used as a basis for thinking tools or frameworks for the enhancement of problem-solving. Tools of this form would complement the mathematical models used in analysis and address areas of the process of statistical investigation that the mathematical models do not, particularly areas requiring the synthesis of problem-contextual and statistical understanding. The central element of published definitions of statistical thinking is "variation". We further discuss the role of variation in the statistical conception of real-world problems, including the search for causes. 相似文献
997.
Inclusive innovation, which we define as innovation that benefits the disenfranchised, is a process as well as a performance outcome. Consideration of inclusive innovation points to inequalities that may arise in the development and commercialization of innovations, and also acknowledges the inequalities that may occur as a result of value creation and capture. We outline opportunities for the development of theory and empirical research around this construct in the fields of entrepreneurship, strategy, and marketing. We aim for a synthesis in views of inclusive innovation and call for future research that deals directly with value creation and the distributional consequences of innovation. 相似文献
998.
Market Incentives for Safe Foods: An Examination of Shareholder Losses from Meat and Poultry Recalls 总被引:3,自引:0,他引:3
Michael R. Thomsen & Andrew M. McKenzie 《American journal of agricultural economics》2001,83(3):526-537
Meat and poultry recalls, while voluntary, are carried out under governmental oversight. If firms have financial incentives to avoid being implicated in a recall situation, governmental involvement in recalls may cause firms to internalize social costs when making investment decisions concerning food safety controls. To examine these incentives, we analyze federally supervised meat and poultry recalls from 1982 to 1998 within an event study. Results show significant shareholder losses when publicly traded food companies are implicated in a recall involving serious food safety hazards. We find no evidence that the stock market reacts negatively when recalls involve less severe hazards. 相似文献
999.
Klaus M. F. Edelmann 《Tourism Management》1987,8(4)
European governments must recognize the economic significance of the tourism industry to Europe. Dr Klaus Edelmann, Professor at the Swiss School of Tourism Management, describes how modern marketing methods and EEC consensus policies must be adopted to combat increasing competition from outside Europe and expand the domestic market. 相似文献
1000.
F.M. Scherer 《International Journal of the Economics of Business》2014,21(1):27-31
This paper considers two paradoxes concerning the relationship between capital investment decisions and competition. First, conventional capital budgeting methods imply that substantial infra-marginal surpluses are attained above the cost of capital, but this is inconsistent with the premise that returns on capital equal the cost of capital in competitive markets. Second, contrasts in the pharmaceutical industry between high reported returns on capital invested, the accounting treatment of research and development outlays, and inter-firm competition in research and development are explored. 相似文献