全文获取类型
收费全文 | 13824篇 |
免费 | 306篇 |
国内免费 | 13篇 |
专业分类
财政金融 | 2422篇 |
工业经济 | 1063篇 |
计划管理 | 2298篇 |
经济学 | 2968篇 |
综合类 | 299篇 |
运输经济 | 89篇 |
旅游经济 | 280篇 |
贸易经济 | 2494篇 |
农业经济 | 745篇 |
经济概况 | 1461篇 |
邮电经济 | 24篇 |
出版年
2021年 | 86篇 |
2020年 | 151篇 |
2019年 | 221篇 |
2018年 | 284篇 |
2017年 | 317篇 |
2016年 | 298篇 |
2015年 | 210篇 |
2014年 | 328篇 |
2013年 | 1323篇 |
2012年 | 370篇 |
2011年 | 394篇 |
2010年 | 373篇 |
2009年 | 398篇 |
2008年 | 452篇 |
2007年 | 431篇 |
2006年 | 343篇 |
2005年 | 334篇 |
2004年 | 301篇 |
2003年 | 305篇 |
2002年 | 283篇 |
2001年 | 278篇 |
2000年 | 279篇 |
1999年 | 251篇 |
1998年 | 258篇 |
1997年 | 264篇 |
1996年 | 263篇 |
1995年 | 239篇 |
1994年 | 227篇 |
1993年 | 248篇 |
1992年 | 235篇 |
1991年 | 228篇 |
1990年 | 212篇 |
1989年 | 184篇 |
1988年 | 144篇 |
1987年 | 175篇 |
1986年 | 176篇 |
1985年 | 261篇 |
1984年 | 272篇 |
1983年 | 263篇 |
1982年 | 235篇 |
1981年 | 234篇 |
1980年 | 198篇 |
1979年 | 209篇 |
1978年 | 151篇 |
1977年 | 157篇 |
1976年 | 136篇 |
1975年 | 108篇 |
1974年 | 102篇 |
1973年 | 93篇 |
1972年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
151.
The knowledge‐based view of the firm is a recent approach to understanding the relationship between firm capabilities and firm performance. Specifically, this approach suggests that knowledge generation, accumulation and application may be the source of superior performance. Other research has conceptualized organizational knowledge in terms of stocks of accumulated knowledge in the firm and flows of knowledge into the firm. This paper tests the relationship between stocks and flows of organizational knowledge and firm performance in the biotechnology industry. We suggest that a firm’s geographic location, alliances with other institutions and organizations and R&D expenditures are representative of knowledge flows, while products in the pipeline, firm citations and patents are indicative of knowledge stocks. Through factor analysis, we develop an aggregated measure of location from several variables. A regression model suggests that location is a significant predictor of firm performance as are products in the pipeline and firm citations. A major contribution of this investigation is the operationalization of geographic location and its statistically significant link to firm performance. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
152.
转型经济背景下,新创企业需要面对复杂的不确定性和机会主义行为,这使得企业获取资源更加困难。信任是一种理想的非正式的市场治理机制,有助于新创企业在法律、法规等正式制度不能完全发挥作用的转型经济环境下,减少不确定性和机会主义行为的影响,获取更多关键性资源。 相似文献
153.
We examine the average costs of electricity generated in NSW at the site level employing a new simultaneous-equations model approach Further, we argue that costs depend principally on unit size and capacity utilization We reinterpret capacity utilization as a compositional variable which is a continuous proxy for the (inverse of) the intensity of demand for electricity, thus partially addressing the multi-product nature of electricity. Low capacity utilization corresponds to intense demands and hence peaking output We find that costs per kWh, as conventionally measured, are highly sensitive to the degree of capacity utilization but less so to unit size (scale). The results emphasize the need for tine-related pricing 相似文献
154.
This is a case study of the effect of subsidized housing on the value of adjacent non-subsidized housing. Four townhouse clusters in Fairfax County, Virginia, were selected for study because of the high degree of homogeneity between clusters. The clusters are all in the same community but vary in distance from subsidized housing. Sale prices were analyzed using a regression model which included distance from subsidized housing as an independent variable. Based on the results of the regression analysis, the authors conclude that the subsidized housing had a negative impact on the values of adjacent properties. 相似文献
155.
Many strategies have been used to solve the nurse shortage. The shortage of nurses has in many ways alerted us to the need to provide safe and efficient care using the latest technology. Nursing needs to adopt, refine, and use this technology so the impact of the nursing shortage is just another statistic and not a disruptive and costly threat to the public. 相似文献
156.
157.
A Welfare-to-Work (WTW) program is a mix of government expenditures on various labour market policies targeted to the unemployed ( e.g. unemployment insurance (UI), job search monitoring (JM), social assistance (SA), wage subsidies). This paper provides a dynamic principal–agent framework suitable for analysing chief features of an optimal WTW program, such as the sequence and duration of the different policies, the dynamic pattern of payments along the unemployment spell, and the emergence of taxes/subsidies upon re-employment. The optimal program endogenously generates an absorbing policy of last resort ("social assistance") characterized by a constant lifetime payment and no active participation by the agent. Human capital depreciation is a necessary condition for policy transitions to be part of an optimal WTW program. The typical sequence of policies is quite simple: the program starts with standard UI, then switches into monitored search and, finally, into SA. The optimal benefits are decreasing during unemployment insurance and constant during both JM and SA. Whereas taxes (subsidies) can be either increasing or decreasing with duration during UI, they must decrease (increase) during a phase of JM. In a calibration exercise, we use our model to analyse quantitatively the features of the optimal program for the U.S. economy. With respect to the existing U.S. system, the optimal WTW scheme delivers sizeable welfare gains to unskilled workers because the incentives to search for a job can be retained even while delivering more insurance and using costly monitoring less intensively. 相似文献
158.
159.
160.
We study the impact of Quickpay, a reform that permanently accelerated payments to small business contractors of the U.S. government. We find a strong direct effect of the reform on employment growth at the firm level. However, we document substantial crowding out of nontreated firms' employment within local labor markets. While the overall net employment effect is positive, it is close to zero in tight labor markets. Our results highlight an important channel for alleviating financing constraints in small firms, but emphasize the general-equilibrium effects of large-scale interventions, which can lead to lower aggregate outcomes depending on labor market conditions. 相似文献