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   1873篇
  免费   183篇
  国内免费   4篇
财政金融   249篇
工业经济   114篇
计划管理   363篇
经济学   322篇
综合类   134篇
运输经济   25篇
旅游经济   56篇
贸易经济   301篇
农业经济   309篇
经济概况   187篇
  2025年   9篇
  2024年   39篇
  2023年   47篇
  2022年   38篇
  2021年   81篇
  2020年   102篇
  2019年   52篇
  2018年   70篇
  2017年   89篇
  2016年   80篇
  2015年   65篇
  2014年   125篇
  2013年   195篇
  2012年   139篇
  2011年   151篇
  2010年   104篇
  2009年   131篇
  2008年   113篇
  2007年   75篇
  2006年   82篇
  2005年   70篇
  2004年   44篇
  2003年   29篇
  2002年   25篇
  2001年   19篇
  2000年   27篇
  1999年   11篇
  1998年   10篇
  1997年   11篇
  1996年   7篇
  1994年   2篇
  1993年   2篇
  1992年   5篇
  1991年   4篇
  1989年   1篇
  1988年   2篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1981年   1篇
排序方式: 共有2060条查询结果,搜索用时 15 毫秒
991.
    
Increased fertilizer use will likely be crucial for raising and sustaining farm productivity in Africa, but adoption may be limited by ineffectiveness under certain conditions. This article quantifies the impacts of soil characteristics on maize response to fertilizer in Zambia using a nationally representative sample of 1453 fields, combining economic, farm management and soil analysis data. Depending on soil regimes, average maize yield response estimates range from insignificant (0) to 7 maize kg per fertilizer kg. For the majority of farmers, the estimated average value cost ratio is between 1 and 2, meaning fertilizer use would be fiscally rational, barring uncertainty and transfer costs. Since transfer costs exist and outcomes are uncertain, however, many farmers may sensibly pause before deciding whether to adopt fertilizer. This suggests shifting the emphasis of chronically low fertilizer use in Africa away from explanations of “market failure” toward greater emphasis on improving fertilizer efficacy.  相似文献   
992.
This paper explains multi-tranche structuring and the yield that securitisation bonds offer by incorporating several factors into a comprehensive model. Results indicate that the degree of complexity of multi-tranche securitisation structures is related to market completeness and solving information asymmetry problems. We also find that the complexity of multi-tranche structure enables the yield offered by triple-A bonds to be reduced but not the average yield, concluding that tranching is a zero-sum game. This research uses a database comprising of all the MBS and ABS issues (1993–2011) in Spain, one of the world’s main securitisation markets. Analysing this long period has allowed us, for the first time, to contrast the Great Financial Crisis (GFC) disruptive effect on the analysed relationships in the securitisation market.  相似文献   
993.
Applying the VAR model and using the interest rate as a monetary policy variable, we find that in the long run, output in China responds negatively to a shock to the interest rate, the real exchange rate, government debt, or the inflation rate, and it reacts positively to a shock to government deficits or lagged own output. When real M2 is chosen as a monetary policy variable, long-term output in China responds positively to a shock to real M2 or lagged own output, and it reacts negatively to a shock to the real exchange rate, government debt, or government deficits. Its response to a shock to the inflation rate is negative when government debt is used and is positive when government deficits are considered. In the short run, fiscal policy is more important than monetary policy in three out of four cases. In the long run, monetary policy is more influential than fiscal policy in three out of four cases. Therefore, the government may consider conducting monetary and fiscal policies differently in the short run and long run. The government needs to be cautious in pursuing deficit spending as its long-term impacts depend on the monetary variable employed. The policy of maintaining a relatively stable exchange rate is appropriate as the depreciation of the Yuan may hurt the economy in the short run.JEL Classifications: E5, F4, H6  相似文献   
994.
Abstract

The years immediately preceding the financial crisis of 2007 witnessed an explosive growth in the supplies both of the long-term securities issued by the shadow banking entities, the asset-backed securities (ABSs) and collateralized debt obligations (CDOs), and of the short-term securities issued by these entities, notably asset-backed commercial paper (ABCP). Although there is now some acknowledgment that the search for yield was the major driver of ABS and CDO growth in the United States, the same is not true of the U.S. ABCP market where other factors such as regulatory arbitrage on the part of banks or the safety and liquidity concerns of institutional investors are seen as having been the more important growth driving force. This article argues that the search for yield did play a crucial role in U.S. ABCP growth between 2004 and 2007. To back up this argument, the article points to four variables that were closely correlated with this growth: the federal funds rate; U.S. money market mutual funds asset holdings; the change in the geographical breakdown of the institutions supplying ABCP; and, finally, the change in the program breakdown of the ABCP market.  相似文献   
995.
We evaluate the performance of area yield crop insurance (AYCI) and farm yield crop insurance (FYCI) using farm-level yield data from China, focusing on their effects on farmers' welfare, and their cost-effectiveness in terms of government subsidy. Given a subsidy rate sufficient to generate a politically acceptable participation level, the price advantage of AYCI may no longer offset its higher basis risk, and consequently FYCI may be preferred by farmers. From the government's perspective, AYCI is the cheapest option to maintain reasonable farmer participation in insurance, but is not necessarily the most cost-effective choice. Our findings suggest that, contrary to an assumption that informs many developing country agricultural insurance programmes, AYCI schemes are not necessarily preferred to FYCI. Decisions on the structure of a national agricultural insurance programme should be based on careful consideration of local conditions.  相似文献   
996.
As the size of government sponsored enterprises (GSE) has grown, attention has focused on the relationship between the federal government and the GSEs, with particular attention focused on estimating the impact of this relationship on GSE debt costs. Quantifying the GSEs cost advantage is a controversial exercise with several competing methodologies providing divergent values. Thus, this paper reviews the methods that have been utilized in previous studies and recommends an alternative approach that overcomes many of the criticisms of previous work. By using offering yields on GSE debt, we find that the three housing GSEs enjoyed an average advantage of between 25 and 29 basis points over AA banking sector bonds, between 43 and 47 basis points over A rated bonds, and between 76 and 80 basis points over BBB rated banking issues. We find that our results are robust to both the basic approach taken as well as to model specification.  相似文献   
997.
    
The aim of this paper is the analysis of the yield spreads between Treasury and non–Treasury Spanish fixed income assets and its relationship with the term to maturity. We find a downward sloping term structure of yield spreads for investment–grade bonds that seems to be contrary to the 'crisis at maturity' theory. However, we claim that this outcome is caused mainly by the effect of liquidity on yield spreads. Once the effect of liquidity and other factors are removed we find that there is a positive relationship between default premiums and term to maturity. That result is now consistent with the existing literature.  相似文献   
998.
    
Pearn  W. L.  Lin  G. H.  Wang  K. H. 《Quality and Quantity》2004,38(1):95-111
Process yield is the most common criterion used in the manufacturing industry for measuring process performance. A measurement index, called Spk, has been proposed to calculate the yield for normal processes. The measurement index pk establishes the relationship between the manufacturing specifications and the actual process performance, which provides an exact measure on process yield. Unfortunately, the sampling distribution of the estimated pk is mathematically intractable. Therefore, process performance testing cannot be performed. In this paper; we consider a normal approximation to the distribution of the estimated pk, and investigate its accuracy computationally. We compare the critical values calculated from the approximate distribution with those obtained using the standard simulation technique, for various commonly used quality requirements. Extensive computational results are provided and analyzed. The investigation is useful to the practitioners for making decisions in testing process performance based on the yield.  相似文献   
999.
    
This paper examines the determinants and impacts of the adoption of five mutually exclusive practices System of Rice Intensification (SRI) on yields and household incomes using a multinomial endogenous treatment effects model. Farm household survey data is collected from selected districts of three States of India. Results suggest that the decision to adopt SRI is a function of experience in terms of age, farm assets, irrigation facility and information about SRI. The analysis showed that small and marginal farmers are more likely to adopt SRI as compared to large farmers. The National Food Security Mission (NFSM) came out to be significant and positive only in the case of few practices in some States. The welfare outcome results showed that the adoption increased the yield and income of three out of four practices-plant plus water, plant plus soil and plant plus water plus soil management. Briefly, the results show that the adoption of SRI especially full adoption of SRI has greater impact on the yield and income.  相似文献   
1000.
    
Abstract

Economics and business students are taught that sunk costs are irrelevant to their decisions. Yet, there is ample evidence that managers fail to integrate this simple rule and fall prey to what is known as the sunk-costs bias. To mitigate cognitive biases, such as the sunk-cost bias, educators must raise students’ awareness of these common judgment errors. In this article, the author proposes a classroom activity that actively engages students and allows them to identify this bias in their own judgments. The activity builds on a series of experiments from the psychology literature. The author discusses how these experiments have been adapted for classroom use and presents evidence suggesting that the activity increased students’ awareness of the sunk-cost bias and improved their decision-making skills.  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