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   15769篇
  免费   339篇
财政金融   3016篇
工业经济   1314篇
计划管理   2640篇
经济学   3337篇
综合类   159篇
运输经济   129篇
旅游经济   271篇
贸易经济   2387篇
农业经济   725篇
经济概况   2118篇
信息产业经济   2篇
邮电经济   10篇
  2021年   110篇
  2020年   176篇
  2019年   231篇
  2018年   333篇
  2017年   326篇
  2016年   303篇
  2015年   216篇
  2014年   351篇
  2013年   1654篇
  2012年   473篇
  2011年   490篇
  2010年   461篇
  2009年   542篇
  2008年   461篇
  2007年   389篇
  2006年   369篇
  2005年   297篇
  2004年   310篇
  2003年   309篇
  2002年   296篇
  2001年   294篇
  2000年   339篇
  1999年   294篇
  1998年   271篇
  1997年   278篇
  1996年   258篇
  1995年   239篇
  1994年   235篇
  1993年   273篇
  1992年   249篇
  1991年   253篇
  1990年   241篇
  1989年   224篇
  1988年   210篇
  1987年   190篇
  1986年   218篇
  1985年   299篇
  1984年   276篇
  1983年   271篇
  1982年   227篇
  1981年   223篇
  1980年   243篇
  1979年   205篇
  1978年   173篇
  1977年   165篇
  1976年   144篇
  1975年   131篇
  1974年   112篇
  1973年   112篇
  1972年   86篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Abstract . Rent seeking involves the wasteful expenses incurred to secure, acquire, or maintain a monopoly position. Rent avoiding involves the expenditures undertaken to avoid the imposition of rent-seeking costs. Each represents a social cost of Tullock rectangle loss in addition to the dead-weight or Harberger triangle loss that combined to form the Harberger-Tullock trapezoid social cost. The first Food Stamp Program in the United States came about through the rent-seeking and/or rent-avoiding efforts of farmers, grocers, bankers, and other economic agents and did not lead to the promotion of social welfare. The evidence of these self-interested efforts was gleaned from articles in the New York Times and government documents. The first Food Stamp Program also fits the economic theory of regulation developed by Stigler, Jordan, Peltzman and others, and it involved imposed costs on economic agents as the program evolved.  相似文献   
92.
We present general results for finding or boundingt maxB , the maximum number of arbitrary whole blocks of observations which can be removed from a block design, and still leave all of the elementary treatment contrasts estimable. The block sizes may be larger than the number of treatments. The results are applied to BBDs, reinforced BIBDs and BBDs, BTIBDs, and a series of variance balanced incomplete block designs with two block sizes. Also given for most of these designs, are results fort max, the maximum number of arbitrary, scattered observations that can become unavailable, and still leave all of the elementary treatment contrasts estimable.The work was undertaken while Dr. Whittinghill was visiting Ohio State University, and supported by a grant from the Natural Sciences Division, Colby College, Waterville, Maine.  相似文献   
93.
The problem of comparing the precisions of two instruments using repeated measurements can be cast as an extension of the Pitman-Morgan problem of testing equality of variances of a bivariate normal distribution. Hawkins (1981) decomposes the hypothesis of equal variances in this model into two subhypotheses for which simple tests exist. For the overall hypothesis he proposes to combine the tests of the subhypotheses using Fisher's method and empirically compares the component tests and their combination with the likelihood ratio test. In this paper an attempt is made to resolve some discrepancies and puzzling conclusions in Hawkins's study and to propose simple modifications.
The new tests are compared to the tests discussed by Hawkins and to each other both in terms of the finite sample power (estimated by Monte Carlo simulation) and theoretically in terms of asymptotic relative efficiencies.  相似文献   
94.
95.
A procedure is given for the construction of a monotone estimator that dominates a given estimator for a class of discrete distributions with monotone likelihood ratio. This procedure is applied to some empirical Bayes estimators. Monte Carlo results are given that demonstrate the usefulness of monotonizing.  相似文献   
96.
Abstract.  While it is well known that demand elasticities calculated at the macro level will in general differ from those calculated at the micro level because of aggregation effects, there remain the questions of how large the effects are and how they vary with the degree of inequality in the income distribution. We explore these questions with models based on a quadratic version of the Almost Ideal Demand System. We investigate the elasticity differences theoretically and then calibrate the models and generate numerical results, using income data for seven countries with widely different distributions. The aggregation effects are found generally to be rather small, even with highly unequal income distributions.  相似文献   
97.
This study is concerned with one aspect of the family cycle, namely, the transition from young married to young married with small children. The focus is on developing models to forecast entries into this latter stage for the purpose of marketing research. "Using ordinary least squares, forecasting models were estimated for (1) total number of first births, (2) number of white first births, and (3) number of nonwhite first births." Models are estimated for both the United States and California using data from official sources.  相似文献   
98.
On the simple model of a (univariate) random process some general problems of “random logic” are discussed. New random approaches to explorative, normative and systematic (normex) forecasting are developed, and some applications are suggested.  相似文献   
99.
A bstract . Orthodox economics has been quite effective in exploiting equilibrium methodology; equilibrium as a heuristic device, as a theoretical norm, and as a prototype of the scientific method. Also, orthodoxy has contrived the dichotomy of equilibrium-anti-equilibrium to depict institutional thought as being muddled and unscientific. Institutionalists have not successfully countered these attacks, nor have they adequately articulated a comprehensive methodological alternative to orthodoxy. Institutionalists have paid too much attention to the methodological components of institutionalism and have neglected the articulation of a guiding, overall methodology. It is proposed that institutionalists recast the methodological debate by expanding the arena from equilibrium-anti-equilibrium analysis to the broader context of closed versus open systems analysis. This would both help expose the methodological weaknesses of orthodox economics, and demonstrate the relevance and power of institutionalism for socioeconomic investigation.  相似文献   
100.
In a model of economic ‘clubs’, size is fixed and members consuming a public good raise the question of composition; with whom would they rather consume? This depends on the way collective consumption is financed, and three results are proven With a poll tax, clubs must be homogeneous in income for all to be satisfied With a marginal benefit (Lindahl) tax, no consumer is ever satisfied with any composition; and with an income tax, at least one consumer in each club is always dissatisfied. Satisfaction implies there exists no club composition preferred to the existing one.  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