全文获取类型
收费全文 | 5034篇 |
免费 | 105篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 852篇 |
工业经济 | 341篇 |
计划管理 | 779篇 |
经济学 | 1084篇 |
综合类 | 65篇 |
运输经济 | 27篇 |
旅游经济 | 63篇 |
贸易经济 | 759篇 |
农业经济 | 233篇 |
经济概况 | 934篇 |
邮电经济 | 3篇 |
出版年
2021年 | 30篇 |
2020年 | 64篇 |
2019年 | 103篇 |
2018年 | 119篇 |
2017年 | 128篇 |
2016年 | 118篇 |
2015年 | 64篇 |
2014年 | 122篇 |
2013年 | 483篇 |
2012年 | 147篇 |
2011年 | 189篇 |
2010年 | 151篇 |
2009年 | 141篇 |
2008年 | 139篇 |
2007年 | 130篇 |
2006年 | 113篇 |
2005年 | 85篇 |
2004年 | 85篇 |
2003年 | 85篇 |
2002年 | 84篇 |
2001年 | 115篇 |
2000年 | 104篇 |
1999年 | 82篇 |
1998年 | 99篇 |
1997年 | 73篇 |
1996年 | 70篇 |
1995年 | 87篇 |
1994年 | 57篇 |
1993年 | 83篇 |
1992年 | 74篇 |
1991年 | 79篇 |
1990年 | 71篇 |
1989年 | 76篇 |
1988年 | 66篇 |
1987年 | 70篇 |
1986年 | 74篇 |
1985年 | 78篇 |
1984年 | 89篇 |
1983年 | 64篇 |
1982年 | 70篇 |
1981年 | 66篇 |
1980年 | 76篇 |
1979年 | 65篇 |
1978年 | 46篇 |
1977年 | 49篇 |
1976年 | 39篇 |
1975年 | 48篇 |
1974年 | 33篇 |
1973年 | 39篇 |
1972年 | 33篇 |
排序方式: 共有5140条查询结果,搜索用时 31 毫秒
951.
Static tradeoff theories, which do not explicitly treat the impact of transaction costs, do not explain the policy of asymmetry between frequent small debt transactions and infrequent large equity transactions. Nor do these theories explain why the debt ratio is allowed to wander a considerable distance from its alleged static optimum, or how much of a distance should be tolerated. We offer a class of diffusion models that mimic this behaviour in a stochastic-dynamic framework and are designed to optimize a financing strategy using any static tradeoff theory as input. The models developed reveal the determinants of the size and frequency of equity transactions and the range of values over which leverage variations are tolerated in four generic scenarios. They also yield a new formulation of the cost of capital that recognizes stochastic transaction costs and a penalty for deviation from any static-optimal leverage. Our class of models augments the pecking order theory, provides a flexible quantitative framework for its implementation as a decision tool, and facilitates the formulation of additional hypotheses for its empirical validation. Symmetrically, our results show the importance of dynamic factors in designing and interpreting empirical tests of static tradeoff theories. The results presented have important implications for the role played by static tradeoff theories in a stochastic-dynamic framework. One such implication is that the static-optimal leverage has no direct effect on the firm's leverage policy in this setting. The target leverage for refinancing transactions is different from the static-optimal leverage, and the mean leverage is generally different from both. As a consequence, the latter cannot be used to estimate the former. Another implication is that even when the mean leverage equals the static optimum, mean reversion is not an optimal behaviour and therefore not a legitimate test for the existence of a static tradeoff in a dynamic context. Still another implication is that wide variations in leverage ratios cannot be interpreted as evidence of leverage indifference. It follows that the pecking order theory is consistent with static tradeoff theories and does not require the assumption of leverage indifference. 相似文献
952.
Rahel Nüssli Christian Schmid 《International journal of urban and regional research》2016,40(3):679-701
Starting from current debates on ‘global suburbanism' and ‘postsuburbia', this article explores the changes that the former ‘urban periphery' of Zurich North has experienced in the last three decades. It mobilizes Henri Lefebvre's triadic concept of conceived, perceived and lived space in aid of an analysis of the profound urban transformations that can be observed. The construction of a new tramline serves as a guideline for an analysis of the implementation of new governance arrangements strengthening cross‐border cooperation between individual municipalities and new strategies of cooptation and expertise. This resulted in the production of new urban structures which led to a more densely woven and connected urban fabric primarily providing spaces for the headquarter economy and middle‐class housing. Concomitantly, great efforts have been made to create new public spaces, an urban image and even an urban atmosphere. These have proved at least partially successful, thus promoting a symbolic redefinition of the former urban periphery as a distinctively ‘urban' space. Conventional definitions and concepts no longer suffice to adequately understand such novel urban forms, leading to the conclusion that division into an ‘urban' and a ‘suburban' world is no longer a useful tool for urban analysis. 相似文献
953.
954.
Enhancing Stock Market Return with New Product Preannouncements: The Role of Information Quality and Innovativeness 下载免费PDF全文
Ruby P. Lee Qimei Chen Nathaniel N. Hartmann 《Journal of Product Innovation Management》2016,33(4):455-471
To advance development and application of signaling theory in the new product preannouncement literature while seeking to resolve ambiguity regarding the influence of innovativeness on stock market return, the role of information quality is examined. Specifically, this study investigates the effect of innovativeness across low and high levels of information quality. The results, ascertained using event study methodology on a sample of 243 new product preannouncements collected over a nine‐year period, indicate that higher information quality increases the strength of the positive relationship between innovativeness and stock market return. The findings offer managers insight into what role information quality plays in new product preannouncements that can help their firms generate higher stock market return. 相似文献
955.
At any moment a student may decide to leave school and enter the labor market, or to stay in the education system. The timing of their departure determines their level of academic achievement and formal qualification. Education is a multi-stage process of investing in an accumulative human capital stock. How long can I expect to go to school? How much will I invest in my education? To answer these questions we apply the real option approach. We depart from recent literature by (1) adding accumulated education costs and determining the expected time of market entry, (2) considering complete earnings profiles including entry-level wages, sheepskin effects and earning dynamics, and (3) discussing the option value of schooling while introducing potential career opportunities or threats of unemployment modeled as major uncertain events connected with particular formal education achievements. 相似文献
956.
W. N. W. Azman-Saini M. Azali M. S. Habibullah K. G. Matthews 《Applied economics》2013,45(18):2283-2288
The existence of long-run relationships among the ASEAN-5 equity markets is empirically investigated. This study utilized weekly data spanning January 1988 to August 1999. The results of Granger noncausality test due to Toda and Yamamoto (Journal of Econometrics,66, 225–50, 1995) reveal that the Singapore equity market was not affected by other markets except by the Philippines in the long run. This result shows that there exist opportunities for beneficial international portfolio diversification within the context of the Asean-5 equity markets. 相似文献
957.
Edward N. Wolff 《Review of Income and Wealth》2002,48(1):59-75
I develop three measures of structural change on the basis of U.S. data: changes in occupational composition, changes in input–output technical coefficients, and changes in capital coefficients. Using pooled cross-section, time-series data for 44 industries over the period from 1970 to 1990, I find that computer investment per worker has had a positive and significant effect on the degree of occupational change and changes in input and capital coefficients. 相似文献
958.
This study examines the revaluation of shares surrounding the cancellation of mergers over the years 1976–1985. The results are first categorized according to the party cancelling the merger and then by subsequent merger activity. The results are as expected: target firms that become involved in merger activity, subsequent to the cancellation, experience positive cumulative prediction errors (CPEs). Targets that do not become involved in subsequent merger activity have CPEs that return to pre-merger announcement levels. These results do not vary when bidders or targets cancel the merger. 相似文献
959.
N. Edward Coulson 《The Journal of Real Estate Finance and Economics》2002,24(3):261-276
There are significant disparities in homeownership rates across the regions and states of the United States. The causes of these disparities are determined within a standard probit model of the individual homeownership decision where the micro-level observations are aggregated to the regional level. Factors which play a significant role at the individual level are evaluated for their ability to explain regional differentiation. The relative price of owning and renting plays a major role as do other market level determinants. Individual demographic characteristics are not as important with the exception of those related to the immigration and citizenship status of the household head. 相似文献
960.
We study information demand and supply at the firm and market level using data for 30 of the largest stocks traded on NYSE and NASDAQ. Demand is approximated in a novel manner from weekly internet search volume time series drawn from the recently released Google Trends database. Our paper makes contributions in four main directions. First, although information demand and supply tend to be positively correlated, their dynamic interactions do not allow conclusive inferences about the information discovery process. Second, demand for information at the market level is significantly positively related to historical and implied measures of volatility and to trading volume, even after controlling for market return and information supply. Third, information demand increases significantly during periods of higher returns. Fourth, analysis of the expected variance risk premium confirms for the first time empirically the hypothesis that investors demand more information as their level of risk aversion increases. 相似文献