全文获取类型
收费全文 | 135276篇 |
免费 | 3854篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 25454篇 |
工业经济 | 11544篇 |
计划管理 | 21588篇 |
经济学 | 29000篇 |
综合类 | 1443篇 |
运输经济 | 972篇 |
旅游经济 | 2489篇 |
贸易经济 | 23434篇 |
农业经济 | 6064篇 |
经济概况 | 16849篇 |
信息产业经济 | 7篇 |
邮电经济 | 287篇 |
出版年
2021年 | 841篇 |
2020年 | 1644篇 |
2019年 | 2399篇 |
2018年 | 2333篇 |
2017年 | 2517篇 |
2016年 | 2689篇 |
2015年 | 2098篇 |
2014年 | 3415篇 |
2013年 | 15327篇 |
2012年 | 4188篇 |
2011年 | 4127篇 |
2010年 | 3671篇 |
2009年 | 4323篇 |
2008年 | 3855篇 |
2007年 | 3189篇 |
2006年 | 3564篇 |
2005年 | 3553篇 |
2004年 | 3095篇 |
2003年 | 2873篇 |
2002年 | 2845篇 |
2001年 | 2608篇 |
2000年 | 2531篇 |
1999年 | 2443篇 |
1998年 | 2282篇 |
1997年 | 2322篇 |
1996年 | 2179篇 |
1995年 | 1975篇 |
1994年 | 2000篇 |
1993年 | 1961篇 |
1992年 | 2020篇 |
1991年 | 1902篇 |
1990年 | 1806篇 |
1989年 | 1668篇 |
1988年 | 1607篇 |
1987年 | 1606篇 |
1986年 | 1686篇 |
1985年 | 2433篇 |
1984年 | 2314篇 |
1983年 | 2103篇 |
1982年 | 1965篇 |
1981年 | 1912篇 |
1980年 | 1871篇 |
1979年 | 1807篇 |
1978年 | 1625篇 |
1977年 | 1626篇 |
1976年 | 1376篇 |
1975年 | 1264篇 |
1974年 | 1184篇 |
1973年 | 1186篇 |
1972年 | 898篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Motor carrier safety is an important concern of shippers, carriers, policy makers, consignees, insurance providers, and the motoring public. One aspect of carrier safety that has garnered substantial attention is whether carriers making greater use of owner–operators are more or less safe vis‐à‐vis carriers making greater use of employee drivers. Currently, conflicting theoretical predictions exist regarding the direction of this relationship. In this article, we offer a reconciliation of the alternative theoretical predictions by developing a coherent theory that merges sociological rational choice theory and theory regarding motor carrier safety. We subject our theory to empirical testing by fitting a series of seemingly unrelated regression models to a vector of safety measures tracked as part of the Federal Motor Carrier Safety Administration's Compliance, Safety, and Accountability program. Our results are consistent with our proposed theory of owner—operator safety and provide meaningful theoretical and managerial implications and directions for future research. 相似文献
102.
103.
We investigate whether firms restructure board composition to align with changes in their contracting environment. Board size and independence increase with firm complexity, consistent with theoretical predictions. However, the hypothesized negative relation between board independence and information costs is evident only for firms completing acquisitions. Furthermore, board independence increases to offset increases in CEO power in a sample of firms making acquisitions, but decreases when CEO power increases in a large cross‐section of firms. We conclude that after the Sarbanes–Oxley Act of 2002, firms face constraints adjusting to target board structure, but these constraints can be mitigated by a shock to the contracting environment via acquisition. 相似文献
104.
105.
In this paper, we focus on the question to what extent machine learning (ML) tools can be used to support systematic literature reviews. We apply a ML approach for topic detection to analyze emerging topics in the literature—our context is accounting and finance research in the Asia–Pacific region. To evaluate the robustness of the approach, we compare findings from the automated ML approach with the results from a manual analysis of the literature. The automated approach uses a keyword algorithm detection mechanism whereby the manual analysis uses common techniques for qualitative data analysis, that is, triangulation between researchers (expert judgement). From our paper, we conclude that both methods have strengths and weaknesses. The automated analysis works well for large corpora of text and provides a very standardized and non-biased way of analyzing the literature. However, the human researcher is potentially better equipped to evaluate current issues and future trends in the literature. Overall, the best results might be achieved when a variety of tools are used together. 相似文献
106.
Javier Carbonell Antonio Sánchez-Esguevillas Belén Carro 《Technology Analysis & Strategic Management》2018,30(1):113-129
This paper considers the Web as a big data container that can be used by Technology Observatories and administrations to track emerging issues and more specifically emerging technologies. It considers information that is available on the Internet for free from different sources, and proposes a framework that can be useful to characterise them and to detect patterns of dissemination. This framework is made up of 30 metrics obtained from different kinds of sources (general web, patents, scholars?…). Some of them are obtained directly as the number of hits retrieved by queries on a search engine, and other ones calculated by means of ratios. This paper contains the development of a complete case that utilises this framework to characterise emerging technologies included in the well-known Hype Cycle for Emerging Technologies, in this case the 2015 release1 and to analyze patterns of dissemination of these technologies on the Internet. 相似文献
107.
108.
Michele Fabrizi Elisabetta Ipino Antonio Parbonetti 《Journal of International Financial Management & Accounting》2018,29(3):223-246
US corporations have accumulated record‐high amounts of cash, and most of it is trapped in foreign accounts. This study tests the hypothesis that the marginal value of cash decreases in the presence of tax repatriation costs, as these costs are a strong indication that part of the cash is trapped abroad. Cash abroad is not readily available to the company because it is subject to an additional layer of tax before it can be used or distributed. Moreover, uncertainty surrounds the potential use of foreign cash, and research documents that firms holding high amounts of cash abroad are likely to invest in negative net present value activities. Finally, possible changes in tax regulation are an additional source of uncertainty. Consequently, foreign cash should be worth less than domestic cash. Using a large sample of US firms drawn from COMPUSTAT during the 1991–2012 period, the analysis suggests that shareholders value an extra dollar of cash at $1.086. However, this result changes dramatically when the change in cash is interacted with the tax cost of repatriating the earnings. That is, the marginal value of cash decreases significantly in the presence of tax repatriation costs, and shareholders discount cash when it is likely to be held abroad. This study contributes to the literature on cash holding by investigating whether tax repatriation costs affect the value of corporate cash. Moreover, the findings show that there are important economic consequences linked to the phenomenon of cash accumulation in foreign countries and therefore provide regulators with a sound foundation on which to take additional actions to require more disclosure of and transparency in the actual location of firms’ cash holdings. 相似文献
109.
Gary V. Engelhardt Michael D. Eriksen Nadia Greenhalgh‐Stanley 《Real Estate Economics》2019,47(4):1055-1088
We examine the extent to which parents use housing and shared living arrangements as a form of risk‐sharing for their adult children, using detailed data on children and parents in the Health and Retirement Study for 1998–2012. On average, a young man moving from full‐time to nonemployment raises the likelihood of coresiding with a parent by 1.5 percentage points; moving from full‐time employment to being part‐time employed raises the likelihood of coresiding with a parent by 2 percentage points. The implied elasticity of parental coresidence with respect to the son's income is ‐1.1; for daughters, the elasticity is ‐0.5. 相似文献
110.
Paul Brockman John L. Campbell Hye Seung Lee Jesus M. Salas 《Journal of Business Finance & Accounting》2019,46(3-4):420-456
Internally‐promoted CEOs should have a deep understanding of their firm's products, supply chain, operations, business climate, corporate culture, and how to navigate among employees to get the information they need. Thus, we argue that internally‐promoted CEOs are likely to produce higher quality disclosure than outsider CEOs. Using a sample of US firms from the S&P1500 index from 2001 to 2011, we hand‐collect whether a CEO is hired from inside the firm and, if so, the number of years they worked at the firm before becoming CEO. We then examine whether managers with more internal experience issue higher quality disclosures and offer three main findings. First, CEOs with more internal experience are more likely to issue voluntary earnings forecasts than those managers with less internal experience as well as those managers hired from outside the firm. Second, CEOs with more internal experience issue more accurate earnings forecasts than those managers with less internal experience as well as those managers hired from outside the firm. Finally, investors react more strongly to forecasts issued by insider CEOs than to those issued by outsider CEOs. In additional analysis, we find no evidence that these results extend to mandatory reporting quality (i.e., accruals quality, restatements, or internal control weaknesses), perhaps because mandatory disclosure is subjected to heavy oversight by the board of directors, auditors, and regulators. Overall, our findings suggest that when managers have work experience with the firm prior to becoming the CEO, the firm's voluntary disclosure is of higher quality. 相似文献