全文获取类型
收费全文 | 38264篇 |
免费 | 775篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 7329篇 |
工业经济 | 3000篇 |
计划管理 | 5933篇 |
经济学 | 8440篇 |
综合类 | 535篇 |
运输经济 | 281篇 |
旅游经济 | 721篇 |
贸易经济 | 6146篇 |
农业经济 | 1941篇 |
经济概况 | 4651篇 |
信息产业经济 | 3篇 |
邮电经济 | 60篇 |
出版年
2021年 | 213篇 |
2020年 | 435篇 |
2019年 | 631篇 |
2018年 | 744篇 |
2017年 | 789篇 |
2016年 | 791篇 |
2015年 | 498篇 |
2014年 | 828篇 |
2013年 | 4248篇 |
2012年 | 1088篇 |
2011年 | 1325篇 |
2010年 | 1057篇 |
2009年 | 1208篇 |
2008年 | 1159篇 |
2007年 | 1069篇 |
2006年 | 968篇 |
2005年 | 873篇 |
2004年 | 851篇 |
2003年 | 840篇 |
2002年 | 887篇 |
2001年 | 771篇 |
2000年 | 770篇 |
1999年 | 746篇 |
1998年 | 736篇 |
1997年 | 721篇 |
1996年 | 674篇 |
1995年 | 599篇 |
1994年 | 571篇 |
1993年 | 626篇 |
1992年 | 604篇 |
1991年 | 615篇 |
1990年 | 517篇 |
1989年 | 453篇 |
1988年 | 442篇 |
1987年 | 428篇 |
1986年 | 467篇 |
1985年 | 711篇 |
1984年 | 672篇 |
1983年 | 617篇 |
1982年 | 584篇 |
1981年 | 535篇 |
1980年 | 587篇 |
1979年 | 505篇 |
1978年 | 428篇 |
1977年 | 404篇 |
1976年 | 343篇 |
1975年 | 355篇 |
1974年 | 333篇 |
1973年 | 270篇 |
1972年 | 184篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
122.
This article finds that gender differences in on-the-job training significantly affect the male/female wage gap. First, we find that previously trained workers exhibit larger cumulative wage gains during their current training. Thus, a substantial portion of the gender wage gap results from the fact that women have little prior training relative to men. Second, a significant amount of the observed male/female wage differential is explained by less female acquisition of current training. Gender differences in workplace promotion and training practices help explain why women accumulate less training than men. Both of these sources of gender differences have lessened from 1976 to 1985, which has led to a narrowing of the male/female wage gap. 相似文献
123.
124.
Dynamic futures‐hedging ratios are estimated across seven markets using generalized models of the variance/covariance structure. The hedging performances of the resultant dynamic strategies are then compared with static and naïve strategies, both in‐ and out‐of‐sample. Bayesian‐adjusted hedge ratios also are employed as error purgers. The empirical results indicate that the generalized dynamic models are well specified and that their use in determining optimal hedge ratios can lead to improvements in hedging performance as measured by the volatilities of the returns on the optimally hedged position. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:241–260, 2003 相似文献
125.
In this article, we examine the impact of 21 different types of scheduled macroeconomic news announcements on S&P 100 stock‐index option volume and implied volatility. We find that there is a 2‐h delay after the announcement before volume increases. However, there is an immediate increase in volatility, which slowly dissipates over several hours. Further analysis shows that most of the high volume and volatility after announcements come from the announcements that are considered bad news. That is, bad news creates high volatility and high volume, whereas good news elicits lower volume and is not associated with higher volatility. These results are not consistent with the predictions of any one model. We also find that the announcements that cause the largest reaction in the equity option market are Consumer Credit, Consumer Spending, Factory Inventories, NAPM, and Non‐Farm Payrolls. Six other announcements elicit a mild response. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:315–345, 2003 相似文献
126.
This article provides empirical evidence on the intraday relation between spot volatility and trading volume in the Spanish stock index futures market. GARCH methodology is used to estimate spot volatility. We analyze the potential relation between spot and futures trading volume and spot volatility by estimating the corresponding conditional density functions as proposed in Quah (1997). Our results reveal no significant link between those variables. Similar findings arise when expected and unexpected volume is considered. Our results suggest that derivative market is not a force behind episodes of significant spot jump volatility. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:841–858, 2003 相似文献
127.
Alexander E. Ellinger Daniel F. Lynch James K. Andzulis Ronn J. Smith 《Journal of Business Logistics》2003,24(1):199-220
An Internet presence is a critical early component in the process of building towards a fully operational and unified e‐commerce strategy. E‐commerce has significantly impacted logistics/supply chain strategies and the development and implementation of a website have become key issues for many firms within the transportation industry. This study provides an overview of website content within the motor carrier industry. Content analysis was used to assess the site design, informational content, and the interactive content of 152 motor carrier websites, and to compare the features offered on the Top 100 motor carrier firm websites with those offered on the sites of smaller carrier firms. 相似文献
128.
Collaborative arrangements among members of the supply chain have received a great deal of interest in recent years as a means of reducing costs. One such arrangement is vendor managed inventory (VMI). VMI allows the vendor to make decisions concerning the quantity and timing of deliveries to the retailer. Such an arrangement offers the potential of a more efficient supply chain by removing the negative effects of retail ordering policies. A thorough review of the literature was conducted to identify factors likely to impact the performance of a VMI partnership. Computer simulation was used to study the effects of these factors from both the vendor's and retailer's perspectives. The results lend insight into the performance of VMI and guidance for managers as to the environments in which VMI is most effective. 相似文献
129.
The primary purpose of this research was to investigate the effect of investment in information technology in a supply chain. The results of that investigation are presented by focusing on an empirically tested supply chain relationship model containing both behavioral and operational constructs. The four behavioral constructs represented in the model are relationship trust, relationship commitment, relationship dependence, and long‐term relationship orientation. The four operational constructs represented in the model are retailer investment in interorganizational information technology, perceived supplier investment in interorganizational information technology, logistics efficiency, and logistics effectiveness. Among other findings, the results of the investigation found that perceived supplier investment in interorganizational information technology has a significant and positive effect on logistics efficiency. 相似文献
130.
This study attempts to infuse relationship marketing theory into the study of logistics outsourcing relationships. In particular, the study demonstrates that not all of the partnerships between customers and providers of third‐party logistics services are the same in terms of their level of development. The existence of distinct levels of partnership established previously in the logistics literature is partially supported and a relationship between level of partnership development and the customer perceptions of key relationship marketing elements and outcomes is established. While exploratory in nature, these findings suggest there are benefits for the increased costs of developing closer partnerships. 相似文献