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   2508篇
  免费   145篇
财政金融   304篇
工业经济   86篇
计划管理   582篇
经济学   785篇
综合类   6篇
运输经济   76篇
旅游经济   82篇
贸易经济   558篇
农业经济   79篇
经济概况   91篇
邮电经济   4篇
  2023年   56篇
  2022年   42篇
  2021年   55篇
  2020年   105篇
  2019年   112篇
  2018年   192篇
  2017年   255篇
  2016年   183篇
  2015年   113篇
  2014年   127篇
  2013年   573篇
  2012年   131篇
  2011年   97篇
  2010年   119篇
  2009年   82篇
  2008年   73篇
  2007年   72篇
  2006年   50篇
  2005年   41篇
  2004年   31篇
  2003年   25篇
  2002年   26篇
  2001年   21篇
  2000年   20篇
  1999年   13篇
  1998年   3篇
  1997年   8篇
  1996年   1篇
  1995年   7篇
  1993年   5篇
  1992年   2篇
  1991年   2篇
  1985年   1篇
  1984年   1篇
  1983年   2篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1977年   1篇
  1976年   2篇
  1975年   1篇
排序方式: 共有2653条查询结果,搜索用时 15 毫秒
71.
The paper offers an historical account of the origins and development of the Latin American structuralist approach to the balance of payments between 1944 and 1964. We focus on the contributions by Raul Prebisch, Celso Furtado and Juan Noyola, all of them members of the United Nations Economic Commission for Latin America (CEPAL) during the 1950s. Prebisch used the foreign trade multiplier concept to distinguish the business cycle mechanisms at the ‘centre’ and at the ‘periphery’. Noyola introduced the notion of external disequilibrium as a feature of the industrialization process. This was further elaborated by Prebisch's formula connecting the relative rates of growth to the ratio of income-elasticities of import. Furtado examined the implications of the external demand constraint for economic growth, an important element of the two-gap models of the 1960s. The main piece of empirical structuralist research was the CEPAL 1957 report about Mexican external disequilibrium elaborated by Furtado and Noyola, not published at the time; we discuss that report in the context of the Mexican devaluation of 1954.  相似文献   
72.
We study the incentives to adopt advanced abatement technologies in the presence of imperfect compliance. Interestingly, incentives under emission taxes and pollution abatement subsidies are the same that in the perfect compliance scenario. However, under emission standards imperfect compliance can increase firms’ incentives to invest, whereas under an emission permit mechanism investment incentives decrease only if widespread non-compliance induces a reduction in the permit price. Our results are valid for fairly general characteristics of the monitoring and enforcement strategies commonly found in both, theoretical and empirical applications.  相似文献   
73.
Open Source Software projects base their operation on a collaborative structure for knowledge exchange in the form of provision or reception of information, expertise and feedback on the creation of source code. Here, we address the direction of these knowledge flows among projects throughout social networks and their impact on project success. We identify the roles of membership or contribution that individuals play within projects. We found that connections through contributors who bring their knowledge to the project, improve project success, and that connection through members, who transfer their knowledge towards other projects, enhance project success. Finally, we found that ties through shared membership and contributions hamper project success. The analysis of knowledge flows and their impact on project success imply a translation of returns from investment in social capital, where investment takes the shape of knowledge flows and the returns mean the projects’ diffusion over the network.
Clara E. GarcíaEmail:
  相似文献   
74.
The classical rational expectations model of commodity markets implies that expected spot price risk is an explanatory variable in spot price regressions; and also that inventory carryover, which is reduced by a larger price variance, creates autoregressive conditional heteroscedastic processes in spot prices. In order to falsify/verify this theory, it has typically been assumed that the square root of the conditional variance of spot prices, a proxy for spot price risk, enters the conditional mean function of spot prices. Based on this simple representation, a typical but counter intuitive outcome has been that spot price risk has an insignificant impact on spot prices, see, e.g., Beck (Beck, S., 1993. A Rational Expectations Model of Time Varying Risk Premia in Commodities Futures Markets: Theory and Evidence. International Economic Review 34, 149–168, Beck, S., 2001. Autoregressive Conditional Heteroskedasticity in Commodity Spot Prices. Journal of Applied Econometrics 16, 115–132). In this paper, we propose an alternative functional relationship (from GARCH(1,1) to GARCH(1,1)-AR(m)) between spot price risk and spot prices that is fully supported by the classical rational expectations model, and based on this new representation we are able to provide stronger empirical support for Muth's rational expectation theory.  相似文献   
75.
This paper focuses on a new strand of research that uses stochastic approach for making spatial price comparisons. We propose a novel method to account for the presence of spatial dependencies in consumer prices and consequently in price indexes by imposing penalization conditions on the estimation of traditional CPD models leading to the spatially-penalized country-product-dummy (SP-CPD) model. The paper proposes an appropriate estimation strategy, which enables us to simultaneously estimate all the parameters in the model, including the smoothing parameter of the penalization term instead of determining it externally. In order to estimate spatial price indexes for areas lacking in price data, we suggest applying the kriging methodology to the price indexes obtained from the SP-CPD model. This new approach is applied to official Italian CPI data for constructing regional spatial price indexes for 2014. The results show that price levels are higher in the Northern-Central regions than in the South.  相似文献   
76.
We study the effects of police monitoring on crime. We exploit detailed information on the location and date of installation of police-monitored surveillance cameras, coupled with data at the street-segment level on all reported crimes in the city of Montevideo, Uruguay. We find that the introduction of police-monitored surveillance cameras reduces crime by about 20 percent in monitored areas relative to a pure control group located outside the city. We also explore potential displacement effects, and we do not find evidence of such effects.  相似文献   
77.
In the current global corporate climate that surrounds us, firms would do well to encourage the talent and creativity of their employees in order to achieve success. This is achieved, not by giving priority to individual talent, but by optimizing the collective as a whole and the firm’s activity based on team work and joint effort. Heads of organizations might benefit from creating a favorable context for the birth and growth of collective internal cooperation, which is understood to be the collective ability to create and innovate on the part of the team, the firm or the organization. Having contrasted our hypotheses through research on Spanish firms, we have concluded that job satisfaction and commitment to the team are factors that have a direct and positive effect on collective entrepreneurship.  相似文献   
78.
In this paper, we determine the density functions of nonsymmetrised doubly noncentral matrix variate beta type I and II distributions. The nonsymmetrised density functions of doubly noncentral and noncentral bimatrix variate generalised beta type I and II distributions are also obtained.  相似文献   
79.
This article describes the process for preparing a survey, which will be used to measure relevant variables, which are involved in a study of training needs in a Spanish sports organisation. The variables which have been considered are: problems and difficulties in carrying work of specific positions; “strong points” in carrying out this work; usefulness of the training received in facing and solving the above-mentioned problems and difficulties; usefulness of the training received in acquiring and strengthening these “strong points” in carrying out work; opinion and suggestions with respect to future training. Due to the applied nature of the study, a data collection methodology was designed which was based on interviews and group discussions with a representative sample of workers. Finally, the predictive capacity of perception, which workers have, of their motivation at work was clearly shown in order to then identify different attitude and conduct patterns.  相似文献   
80.
In this paper a reflection is made on the problems that can arise in key sector analysis and industrial clustering, due to the usual presence of outliers when using multidimensional data related to the sectors in an input–output table. Multidimensional outliers are considered as being not only linked to the low number of clusters usually observed in this kind of study, but probably causing invalid results in most of the works involving multivariate statistical techniques, such as cluster and factor analysis. Actually, by comparing the key sectors of the Spanish economy obtained in Díaz et al. (2006) Díaz, B., Moniche, L. and Morillas, A. 2006. A fuzzy clustering approach to the key sectors of the Spanish economy. Economic Systems Research, 18: 299318. [Taylor & Francis Online] [Google Scholar] to the ones we get taking into account the problem the outliers pose, one can realize they greatly distort the results. On the other hand, it is shown that identification of outliers can be considered as a good and new procedure to help select the most important sectors in an economy.  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