全文获取类型
收费全文 | 23016篇 |
免费 | 495篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 4161篇 |
工业经济 | 1869篇 |
计划管理 | 3888篇 |
经济学 | 5260篇 |
综合类 | 309篇 |
运输经济 | 165篇 |
旅游经济 | 312篇 |
贸易经济 | 3594篇 |
农业经济 | 1127篇 |
经济概况 | 2763篇 |
信息产业经济 | 1篇 |
邮电经济 | 63篇 |
出版年
2020年 | 240篇 |
2019年 | 337篇 |
2018年 | 389篇 |
2017年 | 447篇 |
2016年 | 428篇 |
2015年 | 280篇 |
2014年 | 469篇 |
2013年 | 2178篇 |
2012年 | 638篇 |
2011年 | 708篇 |
2010年 | 589篇 |
2009年 | 733篇 |
2008年 | 588篇 |
2007年 | 604篇 |
2006年 | 527篇 |
2005年 | 460篇 |
2004年 | 450篇 |
2003年 | 469篇 |
2002年 | 469篇 |
2001年 | 444篇 |
2000年 | 483篇 |
1999年 | 437篇 |
1998年 | 426篇 |
1997年 | 437篇 |
1996年 | 412篇 |
1995年 | 357篇 |
1994年 | 368篇 |
1993年 | 392篇 |
1992年 | 438篇 |
1991年 | 410篇 |
1990年 | 371篇 |
1989年 | 317篇 |
1988年 | 307篇 |
1987年 | 344篇 |
1986年 | 355篇 |
1985年 | 449篇 |
1984年 | 459篇 |
1983年 | 425篇 |
1982年 | 381篇 |
1981年 | 396篇 |
1980年 | 376篇 |
1979年 | 409篇 |
1978年 | 287篇 |
1977年 | 270篇 |
1976年 | 222篇 |
1975年 | 212篇 |
1974年 | 186篇 |
1973年 | 186篇 |
1972年 | 144篇 |
1971年 | 135篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
KENNETH J. KLASSEN JEFFREY A. PITTMAN MARGARET P. REED STEVE FORTIN 《Contemporary Accounting Research》2004,21(3):639-680
We provide evidence on the impact of tax incentives and financial constraints on corporate R&D expenditure decisions. We contribute to extant research by comparing R&D expenditures in the United States and Canada, thereby exploiting the differences in the two countries' R&D tax credit mechanisms and generally accepted accounting principles. The two tax incentive mechanism designs are consistent with differing views of the degree of financial constraints faced by firms in these economies. Our sample also allows us to explore the effects of capitalizing R&D on Canadian firms. Employing a matched design, we document relations between tax credit incentives and R&D spending consistent with both Canadian and U.S. public companies responding as though they are not financially constrained. We estimate that the Canadian credit system induces, on average, $1.30 of additional R&D spending per dollar of taxes forgone while the U.S. system induces, on average, $2.96 of additional spending. We also find that firms that capitalize R&D costs in Canada spend, on average, 18 percent more on R&D. Collectively, this evidence is important to the ongoing debates in both countries concerning the appropriate design of incentives for R&D and is consistent with the assumptions found in the U.S. tax credit system, but not those found in the Canadian system. 相似文献
33.
We develop a method for determining the significance of the effect of a certain event (stock split, corporate restructuring, change in regulation, etc.) on unsystematic volatility of asset returns. Simulations show that the suggested tests reject the true null hypothesis of no effect on volatility at appropriate levels, whereas the rejection rates of a false null hypothesis increase with the magnitude of the effect. An application of the method to corporate spin‐offs reveals statistically significant and long‐lasting estimated increases in unsystematic volatility of parent companies' returns. 相似文献
34.
Extant empirical research has reported nonlinear behavior within arbitrage relationships. In this article, the authors consider potential nonlinear dynamics within FTSE‐100 index and index‐futures. Such nonlinearity can be rationalized by the existence of transactions costs or through the interaction between informed and noise traders. They consider several empirical models designed to capture these alternative dynamics. Their empirical results provide evidence of a stationary basis term, and thus cointegration between index and index‐futures, and the presence of nonlinear dynamics within that relationship. The results further suggest that noise traders typically engage in momentum trading and are more prone to this behavior type when the underlying market is rising. Fundamental, or arbitrage, traders are characterized by heterogeneity, such that there is slow movement between regimes of behavior. In particular, fundamental traders act more quickly in response to small deviations from equilibrium, but are reluctant to act quickly in response to larger mispricings that are exposed to greater noise trader price risk. © 2006 Wiley Periodicals, Inc. Jrl Fut Mark 26:343–368, 2006 相似文献
35.
Andrew Prevost Ramesh P. Rao & John D. Wagster 《Journal of Business Finance & Accounting》2002,29(7&8):1079-1104
On April 1, 1988, New Zealand stopped the double taxation of dividends by implementing a full dividend imputation program. Because many believed that the tax advantage of debt had led to more highly leveraged firms subject to greater financial risk than was socially optimal, it was hoped the removal of incentives to finance with debt would result in a more efficient allocation of capital. The empirical results suggest that the shareholder wealth gain from dividend imputation was more than offset in firms with large debt levels. Moreover, an examination of debt ratios indicates debt levels declined in the post–imputation period. 相似文献
36.
Lindon J. Robison Robert J. Myers & Marcelo E. Siles 《Review of Agricultural Economics》2002,24(1):44-58
Social capital is a person or group's sympathy for or sense of obligation to another person or group. This article introduces social capital into a neoclassical model of farmland exchange and shows how relationships alter the terms of trade. Empirical evidence from a survey of farmers shows that the type of relationship farmland sellers have with farmland buyers has a statistically significant and economically important effect on the minimum-sell price for farmland. Compared to the minimum-sell price when selling to a total stranger in an arm's-length transaction, farmland sellers discount prices to friendly neighbors and relatives and require a premium from unfriendly neighbors and influential people in the community. 相似文献
37.
38.
Jin E. Zhang 《期货市场杂志》2003,23(6):535-560
This article explores the price of continuously sampled Asian options. For geometric Asian options, we present pricing formulas for both backward‐starting and forward‐starting cases. For arithmetic Asian options, we demonstrate that the governing partial differential equation (PDE) cannot be transformed into a heat equation with constant coefficients; therefore, these options do not have a closed‐form solution of the Black–Scholes type, that is, the solution is not given in terms of the cumulative normal distribution function. We then solve the PDE with a perturbation method and obtain an analytical solution in a series form. Numerical results show that as compared with Zhang's ( 2001 ) highly accurate numerical results, the series converges very quickly and gives a good approximate value that is more accurate than any other approximate method in the literature, at least for the options tested in this article. Graphical results determine that the solution converges globally very quickly especially near the origin, which is the area in which most of the traded Asian options fall. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:535–560, 2003 相似文献
39.
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
40.
William E. Baker 《心理学和销售学》2003,20(12):1119-1135
This article introduces and explores the concept of brand name imprinting. Brand name imprinting is the process of creating and strengthening the brand name node in the brand memory network through brand name exposure. Brand name imprinting at a time prior to the presentation of specific brand information is posited to improve the retention of that information by strengthening the association between the brand name and brand information. The effect is proposed to be automatic and independent of other known means to strengthen memory associations (e.g., level of attention, cognitive elaboration, stimuli vividness, and stimuli distinctiveness). This research also proposes that brand names with neutral meaning better facilitate the imprinting effect, because they do not carry perceptual baggage that can interfere with the creation of new brand name–information associations. An experiment involving brand name imprinting and the learning of brand information supports these assertions. Implications for communication strategy and brand name selection are discussed. © 2003 Wiley Periodicals, Inc. 相似文献