全文获取类型
收费全文 | 23078篇 |
免费 | 634篇 |
专业分类
财政金融 | 4097篇 |
工业经济 | 1633篇 |
计划管理 | 4000篇 |
经济学 | 5502篇 |
综合类 | 246篇 |
运输经济 | 188篇 |
旅游经济 | 343篇 |
贸易经济 | 3852篇 |
农业经济 | 1150篇 |
经济概况 | 2623篇 |
信息产业经济 | 3篇 |
邮电经济 | 75篇 |
出版年
2023年 | 117篇 |
2021年 | 155篇 |
2020年 | 297篇 |
2019年 | 467篇 |
2018年 | 524篇 |
2017年 | 540篇 |
2016年 | 534篇 |
2015年 | 363篇 |
2014年 | 585篇 |
2013年 | 2449篇 |
2012年 | 793篇 |
2011年 | 829篇 |
2010年 | 727篇 |
2009年 | 807篇 |
2008年 | 747篇 |
2007年 | 645篇 |
2006年 | 620篇 |
2005年 | 538篇 |
2004年 | 467篇 |
2003年 | 479篇 |
2002年 | 427篇 |
2001年 | 504篇 |
2000年 | 460篇 |
1999年 | 416篇 |
1998年 | 481篇 |
1997年 | 427篇 |
1996年 | 426篇 |
1995年 | 360篇 |
1994年 | 371篇 |
1993年 | 359篇 |
1992年 | 366篇 |
1991年 | 384篇 |
1990年 | 346篇 |
1989年 | 257篇 |
1988年 | 265篇 |
1987年 | 268篇 |
1986年 | 250篇 |
1985年 | 359篇 |
1984年 | 356篇 |
1983年 | 336篇 |
1982年 | 289篇 |
1981年 | 285篇 |
1980年 | 285篇 |
1979年 | 278篇 |
1978年 | 228篇 |
1977年 | 185篇 |
1976年 | 182篇 |
1975年 | 162篇 |
1974年 | 150篇 |
1973年 | 148篇 |
排序方式: 共有10000条查询结果,搜索用时 203 毫秒
121.
OPTIONS AND EFFICIENCY IN MULTIDATE SECURITY MARKETS 总被引:1,自引:0,他引:1
This paper extends the work of Ross (1976; Q. J. Econ. (90)1, 75–89) to multidate security markets. First, we show that if a primitive security separates states at the terminal date, then there exist multiperiod European options on that security generating dynamically complete markets. Second, we show that if a primitive security conditionally separates states at the terminal date, then there exist multiperiod European options on that security generating generically dynamically complete markets provided that certain conditions hold. Third, we show that there are economies for which the minimum number of multiperiod European options on a primitive security generating generically dynamically complete markets is relatively large. Finally, we show that in these economies, a relatively small number of multiperiod European options on possibly different portfolio strategies of primitive securities generates generically dynamically complete markets. 相似文献
122.
123.
The purpose of this study was to assess the basis behavior of the Live Cattle Futures contract at the Chicago Mercantile Exchange (CME) before and after the 1995 contract changes. Additionally, an alternative method of basis calculation utilizing weighted mean futures prices versus settlement futures prices was compared to determine which method provides a better representation of the basis level. Within a regression model with heteroskedascity error framework, we found that the level of nearby basis in the period after June 1995 has shifted lower and the average monthly open interest of net commercial long positions has substantially increased after the contract modifications. These empirical results are consistent with the notion that more long activity entered the market in response to the contract modifications. Additionally, an alternative (new) measure of basis calculation (cash price minus weighted mean futures price) produced similar results to two other commonly used measures. In conclusion, the 1995 contract changes have neither increased nor decreased the volatility of live cattle basis. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:557–590, 2004 相似文献
124.
125.
126.
Consumer spending over the life span of today's 18‐ to 25‐year‐old emerging adults will reach into the $10 trillion range. Emerging adults are a powerful force in shaping demand for consumer products. The problem recognition styles associated with emerging adults can help marketers understand this group of consumers and provide insight into what kinds of products, services, and messages will appeal to them as lifelong consumers. The purpose of this study was to examine differences between men and women and among fashion consumer groups in fashion problem recognition style. Participants were a convenience sample of emerging adult consumers from one Midwestern university in the US, 136 men and 158 women who completed the Measure of Fashion Innovativeness and Opinion Leadership, Fashion Problem Recognition Style Scale, and provided demographic information. Both fashion followers and men reflected a need‐based approach to problem recognition. Both fashion change agents and women reflected a want‐based approach to problem recognition. Male fashion followers differed from all other groups in indicating a need‐based approach to problem recognition. This study built on previous work by examining differences in problem recognition style owing to fashion consumer group and gender. The basic premise behind problem recognition style was validated; that is, actual state (need‐based) vs. ideal state (want‐based) approaches to fashion problem recognition did relate to fashion consumer group membership and gender. 相似文献
127.
Two questions formed the structure for examining the formal communication among researchers using the Journal of Consumer Studies and Home Economics (JCSHE) The first question pertained to the interrelationship between the literature published and cited in JCSHE. The second asked what impact the literature published in JCSHE had on authors publishing in other journals. By performing Bradford analysis using the 1,160 journal references cited by authors of 210 articles in the first seven volumes of JCSHE, 26 core journals were identified. JCSHE was ranked second because it was cited 54 times in 37 articles by 29 authors. Through citation analysis 17 citing articles published in 12 journals other than JCSHE were found. Seven of these 17 citing articles were published in other home economics journals. 相似文献
128.
This paper analyzes countertrade as a special case of a customs union in which the countertrade agreement gives rise (as in customs union theory) to both trade-creating and trade-diverting effects. The net effects on welfare are ambiguous. A detailed case study from Egypt and brief examples from other countries illustrate the relevance of this interpretation . 相似文献
129.
The principal aim of this paper is to evaluate the impact of the future European high-speed train network on accessibility, by reducing time distance between places and modifying their relative location. We compare the current situation with that foreseen for the year 2010, according to the Outline Plan of the European High-Speed Train Network, in order to analyse which areas will most benefit from construction and improvement of the infrastructure. It is hypothesized that the high-speed train will certainly bring the peripheral regions closer to the central ones, but will also increase imbalances between the main cities and their hinterlands. A weighted average distance indicator is applied for this purpose. This measure identifies the spatial distribution of accessibility in the area of study, emphasizing the infrastructure effects, and locates accessibility changes at the European level. A Geographic Information System (GIS) has been used to carry out this study. 相似文献
130.
Christian M Rogerson 《Development Southern Africa》2002,19(1):143-167
Local economic development (LED) planning is of major policy importance in post-apartheid South Africa. Although issues surrounding LED have attracted considerable policy attention, one neglected theme has been the role of tourism as a lead sector for LED. The aim of this article is to examine the planning and workings of one tourism-led LED initiative in South Africa. The case study is that of the Highlands Meander in Mpumalanga province, where five towns are collaborating in their LED initiatives in order to promote the area's tourism products. A key finding is that this growing tourism initiative is currently not benefiting local black communities. Recommendations are offered for developing a pro-poor tourism initiative. 相似文献