全文获取类型
收费全文 | 22953篇 |
免费 | 661篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 4472篇 |
工业经济 | 1941篇 |
计划管理 | 3925篇 |
经济学 | 4919篇 |
综合类 | 210篇 |
运输经济 | 230篇 |
旅游经济 | 422篇 |
贸易经济 | 3628篇 |
农业经济 | 1007篇 |
经济概况 | 2827篇 |
信息产业经济 | 2篇 |
邮电经济 | 33篇 |
出版年
2021年 | 162篇 |
2020年 | 268篇 |
2019年 | 378篇 |
2018年 | 508篇 |
2017年 | 508篇 |
2016年 | 495篇 |
2015年 | 339篇 |
2014年 | 541篇 |
2013年 | 2475篇 |
2012年 | 753篇 |
2011年 | 778篇 |
2010年 | 719篇 |
2009年 | 820篇 |
2008年 | 696篇 |
2007年 | 608篇 |
2006年 | 593篇 |
2005年 | 511篇 |
2004年 | 528篇 |
2003年 | 512篇 |
2002年 | 477篇 |
2001年 | 477篇 |
2000年 | 513篇 |
1999年 | 466篇 |
1998年 | 412篇 |
1997年 | 422篇 |
1996年 | 401篇 |
1995年 | 357篇 |
1994年 | 353篇 |
1993年 | 394篇 |
1992年 | 354篇 |
1991年 | 346篇 |
1990年 | 327篇 |
1989年 | 297篇 |
1988年 | 292篇 |
1987年 | 252篇 |
1986年 | 302篇 |
1985年 | 403篇 |
1984年 | 378篇 |
1983年 | 352篇 |
1982年 | 309篇 |
1981年 | 292篇 |
1980年 | 319篇 |
1979年 | 270篇 |
1978年 | 233篇 |
1977年 | 213篇 |
1976年 | 188篇 |
1975年 | 165篇 |
1974年 | 140篇 |
1973年 | 149篇 |
1972年 | 112篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
The general consensus in the volatility forecasting literature is that high-frequency volatility models outperform low-frequency volatility models. However, such a conclusion is reached when low-frequency volatility models are estimated from daily returns. Instead, we study this question considering daily, low-frequency volatility estimators based on open, high, low, and close daily prices. Our data sample consists of 18 stock market indices. We find that high-frequency volatility models tend to outperform low-frequency volatility models only for short-term forecasts. As the forecast horizon increases (up to one month), the difference in forecast accuracy becomes statistically indistinguishable for most market indices. To evaluate the practical implications of our results, we study a simple asset allocation problem. The results reveal that asset allocation based on high-frequency volatility model forecasts does not outperform asset allocation based on low-frequency volatility model forecasts. 相似文献
12.
Anette Hallin Tina Karrbom-Gustavsson Peter Dobers 《Business Strategy and the Environment》2021,30(4):1948-1957
Our purpose is to explore the concept of “sustainability” when understood from a performative perspective, i.e. as a concept that is filled with meaning across time. Drawing on a 10 year-long study of the digital footprint of Stockholm Royal Seaport, claimed to be northern Europe's largest sustainable urban development district, we show that “sustainability” emerged as the project became associated with particular places, projects, histories, and technologies. This means that “sustainability” was local in that it was situated in the particular spatial context of the project; temporal in that it was situated in a particular time; and political in that it expressed particular values and perspectives. The study contributes to explaining why “sustainability” remains—and always will remain—a contested concept, which is why sustainability transitions are complex. Consequently, we suggest that the transition towards sustainability always involves the transition of sustainability, something that needs to be acknowledged in order for a transition to actually become sustainable. 相似文献
13.
Both soft, noncontractible, and hard, contractible, information are informative about managerial ability and future firm performance. If a manager's future compensation depends on expectations of ability or future performance, then the manager has implicit incentives to affect the information. We examine the real incentive effects of soft information in a dynamic agency with limited commitment. When long-term contracts are renegotiated, the rewards for future performance inherent in long-term contracts allow the principal partial control over the implicit incentives. This is because the soft information affects the basis for contract renegotiation. With short-term contracts, the principal has no control over the basis for contract negotiation, and thus long-term contracts generally dominate short-term contracts. With long-term contracts, the principal's control over implicit incentives is characterized in terms of effective contracting on an implicit aggregation of the soft information that arises from predicting (forming expectations of) future performance. We provide sufficient conditions for soft information to have no real incentive effects. In general, implicit incentives not controllable by the principal include fixed effects, such as career concerns driven by labor markets external to the agency. When controllable incentives span the fixed effects of career concerns, the latter have no real effects with regard to total managerial incentives—they would optimally be the same with or without career concerns. Our analysis suggests empirical tests for estimating career concerns that should explicitly incorporate noncontractible information. 相似文献
14.
Robert C. Allen 《The Economic history review》2019,72(1):88-125
This article measures the size and incomes of six major social classes across the industrial revolution using social tables for England and Wales in 1688, 1759, 1798, 1846, and 1867. Lindert and Williamson famously revised these tables, and this article extends their work in three directions. First, servants are removed from middle‐ and upper‐class households in the tables of King, Massie, and Colquhoun and tallied separately. Second, estimates are made for the same tables of the number and incomes of women and children employed in the various occupations, and, third, incomes are broken down into rents, profits, and employment income. These extensions to the tables allow variables to be computed that can be checked against independent estimates as a validation exercise. The tables are retabulated in a standardized set of six social groups to highlight the changing structure of society across the industrial revolution. Gini coefficients are computed from the social tables to measure inequality. These measures confirm that Britain traversed a ‘Kuznets curve’ in this period. Changes in overall inequality are related to the changing fortunes of the major social classes. 相似文献
15.
Jeffrey Ng Tharindra Ranasinghe Guifeng Shi Holly Yang 《Journal of Accounting and Public Policy》2019,38(1):15-30
Labor unemployment insurance reduces unemployment concerns. We argue that these benefits moderate incentives to smooth earnings to reduce employees’ concerns about unemployment risk. Using exogenous variations in unemployment insurance benefits, we find evidence consistent with this argument. We also find that the link between unemployment insurance benefits and income smoothing is stronger when there is higher unemployment risk and when the firm is likely to employ more low-wage workers, who find unemployment insurance benefits especially useful. Our paper contributes to the literature by showing that public policy decisions such as unemployment insurance have significant, albeit probably unintended, externalities on corporate financial reporting. 相似文献
16.
We examine how concurrent enforcement changes affect the positive relationship between mandatory IFRS adoption and firms’ voluntary disclosure. We show that the increase in the issuance of management forecasts after IFRS adoption is smaller for firms from IFRS-mandating countries with concurrent enforcement changes than for those from countries without such changes. We find no difference in the increase of forecast informativeness between firms from IFRS-mandating countries without concurrent enforcement changes and firms from non-IFRS-mandating countries; however, firms domiciled in IFRS-mandating countries with concurrent enforcement changes exhibit a significantly smaller increase in forecast informativeness. Our findings suggest that better IFRS enforcement distinctly weakens (strengthens) the positive effect of IFRS adoption on voluntary (mandatory) disclosure. 相似文献
17.
18.
Public pension burdens in most emerging Asian economies are still relatively small. However, there are a number of reasons to believe that they will increase markedly in the coming years. First, many Asian economies will face rapidly ageing populations, which will raise pension and other old‐age‐related spending dramatically. Second, as economies develop, political pressures to expand the coverage of public pensions and raise pension benefits will likely increase. The first objective of this paper is to identify the potential fiscal burden of public pensions in 23 emerging Asian economies, based on econometric models and forecasts of GDP and demographic trends. Using two different methodologies yields estimated increases in the average share of public pension expenditures in GDP of 1.0 percentage point and 3.6 percentage points by 2030 compared with current levels. We believe the latter estimate is more realistic. The second objective is to recommend policies to provide adequate funding for public pension needs, including enhancing the efficiency of social insurance programs, improving the balance of revenues and expenditures, implementing more explicit fiscal rules and frameworks, and establishing stronger fiscal surveillance at the national and regional levels. 相似文献
19.
20.