首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2597篇
  免费   58篇
财政金融   391篇
工业经济   153篇
计划管理   383篇
经济学   661篇
综合类   59篇
运输经济   18篇
旅游经济   36篇
贸易经济   447篇
农业经济   167篇
经济概况   338篇
邮电经济   2篇
  2021年   20篇
  2020年   38篇
  2019年   47篇
  2018年   71篇
  2017年   83篇
  2016年   66篇
  2015年   35篇
  2014年   70篇
  2013年   273篇
  2012年   81篇
  2011年   114篇
  2010年   94篇
  2009年   87篇
  2008年   85篇
  2007年   71篇
  2006年   59篇
  2005年   48篇
  2004年   51篇
  2003年   33篇
  2002年   42篇
  2001年   34篇
  2000年   45篇
  1999年   37篇
  1998年   36篇
  1997年   39篇
  1996年   36篇
  1995年   26篇
  1994年   33篇
  1993年   39篇
  1992年   46篇
  1991年   35篇
  1990年   33篇
  1989年   25篇
  1988年   32篇
  1987年   27篇
  1986年   25篇
  1985年   43篇
  1984年   43篇
  1983年   47篇
  1982年   34篇
  1981年   39篇
  1980年   32篇
  1979年   36篇
  1978年   29篇
  1977年   22篇
  1976年   25篇
  1975年   26篇
  1974年   20篇
  1973年   30篇
  1972年   18篇
排序方式: 共有2655条查询结果,搜索用时 31 毫秒
101.
The current state and the prospects of the use of renewable energy sources (RES) in the world, their total and technical potential and fields of application, and their advantages and disadvantages in comparison with fossil kinds of fuel are considered. Special attention is given to nonconventional RES. The reasons why Russia is lagging behind in the use of these sources are analyzed.  相似文献   
102.
We introduce deep habits into a sticky-price sticky-wage economy and examine the resulting models ability to account for the impact of monetary policy shocks. The deep habits mechanism gives rise to countercyclical markup movements even when prices are flexible and interacts with nominal rigidities in interesting ways. Key parameters are estimated using a limited information approach. The deep habits model can account very precisely for the persistent impact of monetary policy shocks on aggregate consumption and for both the price puzzle and inflation persistence. A key insight is that the deep habits mechanism and nominal rigidities are complementary: the deep habits model can account for the dynamic effects of monetary policy shock at low to moderate levels of nominal rigidities. The results are shown to be stable over time and not caused by monetary policy changes.  相似文献   
103.
104.
Comparative market prices for four freshwater and four marine fish species in the raw and processed forms were determined in a survey within Lagos and Oyo States of Nigeria. Costs of processed fish were calculated relative to the sale prices of their raw equivalents, taking moisture differences and cost of processing into consideration. All the species would have to be sold in the processed form for much higher prices than was found during the survey if sales were to be by weight. Processed catfish, sardine, mudfish and mackerel appear to be sold at a loss while three species (tilapia, sole and bongafish) are sold at very marginal profit. Only tigerfish is sold at reasonable profit. It is suggested that anyone going into fish smoking as a modern business venture should be prepared to face unfair competition in pricing from the small operators who appear to be underpricing their products and who currently dominate almost the entire fish market in Nigeria.  相似文献   
105.
The purpose of the study was to examine the relationship between the extent of household production and satisfaction with household production. Data were obtained from 400 married couples who responded to a postal questionnaire. The dependent variable was an index of satisfaction incorporating two aspects of household production, quality and quantity. Regression analysis indicated that of the three variables representing the extent of household production in the model — hours spent by each spouse in household production and an activity index to measure the number of household production activities — only husband's hours spent in household production demonstrated a significant, independent effect. Other significant variables included husband's hours of market work, household net worth, age of respondent and gender of respondent. Two significant interactions indicated that (i) the relationship between wife's hours of household production and satisfaction with household production differed according to the gender of the respondent, and (ii) the relationship of husband's hours of market work and satisfaction differed according to the age of the respondent.  相似文献   
106.
Empirical studies of hedonic housing prices show that the spatial maximum likelihood estimation (MLE) method is preferable to the traditional ordinary least squares (OLS) hedonic method. Current computing capabilities restrict the MLE method to relatively small data sets. This paper circumvents this limitation by coupling the spatial MLE method with block bootstrapping, a form of Monte Carlo simulation that accounts for spatially dependent data. Blocks are created based on monthly and census tract information for resampling. For each month, we obtained 50 resamples of 750 observations from a data set of 15,727 residential properties to compare OLS and MLE empirical results. We find that the spatial MLE method consistently outperforms the traditional OLS method under these simulated conditions and that air quality matters irrespective of the method used.  相似文献   
107.
108.
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   
109.
110.
The main sources of information for the study of labor migration are discussed, as well as foreign experience in conducting surveys and application applying other sources of migration data. We propose methodological approaches to organizing a household survey to obtain information on labor migration including identification and selection of respondents and determination of basic sets of questions for the survey questionnaire.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号