全文获取类型
收费全文 | 1926篇 |
免费 | 72篇 |
专业分类
财政金融 | 300篇 |
工业经济 | 162篇 |
计划管理 | 411篇 |
经济学 | 423篇 |
综合类 | 18篇 |
运输经济 | 17篇 |
旅游经济 | 24篇 |
贸易经济 | 381篇 |
农业经济 | 54篇 |
经济概况 | 205篇 |
邮电经济 | 3篇 |
出版年
2023年 | 11篇 |
2022年 | 16篇 |
2021年 | 22篇 |
2020年 | 26篇 |
2019年 | 49篇 |
2018年 | 67篇 |
2017年 | 55篇 |
2016年 | 98篇 |
2015年 | 57篇 |
2014年 | 97篇 |
2013年 | 264篇 |
2012年 | 86篇 |
2011年 | 93篇 |
2010年 | 95篇 |
2009年 | 85篇 |
2008年 | 70篇 |
2007年 | 73篇 |
2006年 | 47篇 |
2005年 | 41篇 |
2004年 | 37篇 |
2003年 | 47篇 |
2002年 | 42篇 |
2001年 | 28篇 |
2000年 | 44篇 |
1999年 | 46篇 |
1998年 | 34篇 |
1997年 | 26篇 |
1996年 | 17篇 |
1995年 | 20篇 |
1994年 | 26篇 |
1993年 | 25篇 |
1992年 | 13篇 |
1991年 | 14篇 |
1990年 | 12篇 |
1989年 | 11篇 |
1988年 | 9篇 |
1987年 | 10篇 |
1986年 | 15篇 |
1985年 | 16篇 |
1984年 | 21篇 |
1983年 | 15篇 |
1982年 | 13篇 |
1981年 | 13篇 |
1980年 | 11篇 |
1979年 | 9篇 |
1978年 | 15篇 |
1977年 | 7篇 |
1976年 | 6篇 |
1972年 | 8篇 |
1971年 | 4篇 |
排序方式: 共有1998条查询结果,搜索用时 31 毫秒
61.
Feenstra H Ruiter RA Schepers J Peters GJ Kok G 《International journal of injury control and safety promotion》2011,18(3):181-187
Adolescents are at a greater risk of being involved in traffic accidents than most other age groups, even before they start driving cars. This article aims to determine the factor structure of a self-report questionnaire measuring adolescent risky cycling behaviour, the ACBQ (Adolescent Cycling Behaviour Questionnaire). The questionnaire's structure was based on the widely used Driver Behaviour Questionnaire (DBQ). A sample of secondary school students (N?=?1749; age range: 13-18 years) filled out the questionnaire. Factor analysis revealed a three-factor structure underlying the questionnaire, which was confirmed on two equally large portions of the entire sample. These three underlying factors were identified as errors, common violations and exceptional violations. The ACBQ is a useful instrument for measuring adolescents' risky cycling behaviour. 相似文献
62.
Marion Mehring Christina Seeberg-Elverfeldt Sebastian Koch Jan Barkmann Stefan Schwarze Susanne Stoll-Kleemann 《Land use policy》2011
Forest management poses particular challenges as the pressure on forests is huge due to deforestation. In this context, the establishment of protected areas is a common conservation measure where institutions are put in place and sanctions regarding forest use are enforced. This paper focuses on the practice of sustainable forest management and the associated perspectives of local institutions at the rainforest margins of Lore Lindu National Park (LLNP) in Central Sulawesi, Indonesia. 相似文献
63.
64.
65.
We use data collected from a consumer survey of face‐to‐face interviews to determine consumer demand for genetically modified (GM) tofu attributes in Taiwan. Conjoint analysis using logit models reveals that, on average, brand is the most important attribute in terms of influence on consumers’ preferences, followed by price, with GM content having the least influence. However, the analysis also reveals three distinct market segments for tofu. Apart from the largest segment (which reflects the average lack of concern about GM food), the remaining two segments are split according to their preference or antipathy towards GM tofu. This result suggests that GM labelling is helpful to Taiwanese tofu consumers. 相似文献
66.
Research in economic geography has paid increasing attention to regional innovation systems (RISs) as a potential vehicle for growth and development. Yet despite an increasing amount of research studying RISs in particular and economic regions in general, we have limited knowledge about their influence on entrepreneurs and entrepreneurship. We respond to this knowledge gap and study if entrepreneurs’ localization in thick vs. thin RISs affects their innovativeness and growth ambitions. Thick RISs are predominately urbanized spaces that include organizations of higher-level education, R&D intensive milieus, and an ample industry sector, while thin RISs to a lesser degree encompass these features. Empirically, we analyse 870–917 entrepreneurial firms in Agder of Southern Norway. Based on trade and labour markets, as defined by the EU’s classification of local administrative units (LAU1), we identify two thick and six thin RISs in Agder. Econometric analyses show that entrepreneurs located in thick RISs are more innovative than entrepreneurs located in thin RISs, but there are no significant differences concerning entrepreneurs’ growth ambitions. In light of our findings, we discuss the potential agency role played by entrepreneurial firms at a micro level on path dependent features of RISs at a macro level. 相似文献
67.
68.
Wildlife tourism experiences have the potential to positively impact tourists’ awareness, appreciation and actions in relation to the specific wildlife they encounter and the environment in general. This paper investigates the extent of such impact across multiple sites, and uses Structural Equation Modelling to identify factors that best predict positive long-term learning and environmental behaviour change outcomes. Three sets of variables were measured – visitors’ entering attributes (including pre-visit environmental orientation and motivation for the visit), salient aspects of the experience, and short- and long-term learning and environmental behaviour change outcomes. Although attributes such as pre-visit commitment and motivation to learn were among the best predictors of the long-term impact of the experience, there was evidence that aspects of the experience were also important. In particular, reflective engagement which involved cognitive and affective processing of the experience was found to be associated with short- and long-term environmental learning outcomes. The implications for wildlife tourism managers are discussed. 相似文献
69.
Past research has reported that learning processes in early stage R&D are either chaotic, or absent. We challenge this finding by elaborating Van de Ven et al.’s trial‐and‐error learning model and explore an alternative conceptualization. We explored the combinations of positive and negative outcomes and action course continuation and modification. We use data gathered in an R&D setting of a 4‐years pre‐competitive knowledge generation project in the Dutch paper and board industry. Whereas the Van de Ven and Polley (1992) approach applied on our data also would lead us to conclude that ‘no learning’ would happen, our decomposed model identified three distinct learning patterns: (1) a virtuous pattern of positive outcomes resulting in continuations of action courses; (2) a vacuous pattern of negative outcomes resulting in modifications of action courses; and (3) a verification pattern of positive outcomes resulting in modifications of action courses. We observed the virtuous and verification patterns during the first 2 years and virtuous and vacuous learning in the second 2 years. These results might be useful for R&D managers since they provide insight into how an early stage R&D project can develop and where managers might intervene and adjust action courses. 相似文献
70.
Günther H. Schmitt 《Agricultural Economics》1988,2(2):139-157
Statistical data on labour productivity and income in agriculture reveal large discrepancies between various EC member states, both with respect to their absolute levels and in relation to non-farm productivity and income in the respective countries. Insofar as they appear to reflect the failure of markets in allocating agricultural resources efficiently, and seem to be inconsistent with conventional wisdom concerning structural adjustment of agriculture, however, it can be seen that those data are misleading to a large extent. Based on a simple model of optimal time allocation between farm and non-farm activities of members of farm households, it is demonstrated that farm labour productivity and income must be different according to differences in the relation of farm to non-farm labour supply. The implications concerning international, interregional, intersectoral and intertemporal comparisons of income and productivity are discussed as well as the relevance of market failure in agriculture. 相似文献