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   12559篇
  免费   307篇
  国内免费   1篇
财政金融   2142篇
工业经济   911篇
计划管理   2185篇
经济学   2708篇
综合类   231篇
运输经济   62篇
旅游经济   162篇
贸易经济   2490篇
农业经济   443篇
经济概况   1301篇
信息产业经济   1篇
邮电经济   231篇
  2021年   90篇
  2020年   163篇
  2019年   199篇
  2018年   347篇
  2017年   366篇
  2016年   345篇
  2015年   241篇
  2014年   329篇
  2013年   1288篇
  2012年   396篇
  2011年   414篇
  2010年   424篇
  2009年   430篇
  2008年   398篇
  2007年   342篇
  2006年   267篇
  2005年   242篇
  2004年   233篇
  2003年   247篇
  2002年   213篇
  2001年   241篇
  2000年   262篇
  1999年   200篇
  1998年   199篇
  1997年   218篇
  1996年   196篇
  1995年   195篇
  1994年   185篇
  1993年   185篇
  1992年   208篇
  1991年   209篇
  1990年   169篇
  1989年   167篇
  1988年   131篇
  1987年   130篇
  1986年   137篇
  1985年   194篇
  1984年   170篇
  1983年   189篇
  1982年   157篇
  1981年   182篇
  1980年   154篇
  1979年   176篇
  1978年   145篇
  1977年   128篇
  1976年   143篇
  1975年   121篇
  1974年   112篇
  1973年   91篇
  1972年   73篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
A household survey was done for the U.S. President's Commission on Pension Policy (1979-81). This paper reports on the net wealth of families in the United States for the year 1979, the first wave of the survey. The survey was begun in September 1979 and was a two-wave, nationwide random sample of households in the United States. The survey instrument gathered information on income, wealth, labor supply, participation in pension plans, vesting status, entitlement to various benefits, attitudinal views on retirement, social security wealth, and individual demographic characteristics. Details of the survey methodology are reported. A response rate of sixty-two percent was achieved among the 6,384 dwelling units in the first wave. Imputations are made to calculate the wealth embodied in private and public employee-based pensions. Included in this valuation is an adjustment for expected vesting status in the pension plan. Net wealth is examined by type and age of the head of household. The average net wealth of the family is $53,956, and the average value of retirement wealth is $3,281 which comprises about 5 to 6 percent of net wealth. The striking changes in the portfolio of net wealth are depicted over the cross-section of age cohorts. The oldest age cohort, 65 and over, is found to have for retirement wealth the lowest frequency of ownership, the lowest proportion of their portfolio in this form of wealth, and the second to lowest average value.  相似文献   
992.
Because fees for property management services are based on gross rental collections rather than on net operating incomes, property managers may not always act in the best interest of property owners. This study is an examination of the agency costs that result from the conflict of interests between owners and managers. A nationwide proprietary sample of 242 apartment properties is analyzed to compare agency costs of four distinct types of ownership structures. Agency costs, measured as operating expenses per square foot, are found to be significantly higher for institutional owners than for noninstitutional owners, but not significantly higher in cases where no competition for property management services exists. We conclude that agency costs of property management contracts are significant and the fee provisions of standard property management contracts should be changed to better align the interests of managers and owners.  相似文献   
993.
DILIP B. MADAN 《Abacus》1985,21(2):197-202
It is shown that the economically justifiable criterion for project evaluation of maximizing current net market value is equivalent to maximizing the discounted net cash equivalent flow. It is argued that the appropriate income concept for project evaluation is therefore the one used in the system devised by Chambers, 'Continuously Contemporary Accounting'.  相似文献   
994.
Those economists who expected the increasing US budget deficits in recent years to have a negative impact on private investment spending have so far been proved wrong. Hans-Peter Fröhlich provides an analysis of what has happened and examines the interrelation between public sector deficits and private capital expenditures.  相似文献   
995.
996.
While the marketplace potential of the elderly segment is tremendous, research with regard to what influences the elderly’s patronage behavior has, to date, been inconclusive. This article attempts to determine the effect lack of transportation mobility has on various patronage behaviors. The research reported here is based on a large national smaple of the elderly and incorporates the factors suggested by previous research. The study shows mobility is not a significant influence on the type of retail store frequented, but can influence switching patronage between stores of a given type. Additionally, it was found that mobility is related to the elderly’s psychographic profiles, convenience needs, and information source usage.  相似文献   
997.
An integral part of planning advertising campaigns involves the selection of those media vehicles that maximize the effectiveness of the advertising effort. This article describes a media allocation model designed to provide the media planner, responsible for a particular advertising campaign, with relevant information for use in selecting the most appropriate media vehicles and in determining the number of insertions in each vehicle. It is based on the derivation of nonlinear benefit curves for candidate media vehicles that can be derived from commercially available response data and from subjective estimates gathered from media planning experts. When tested in an actual advertising campaign, the results serve to provide relevant information that can make the media allocation decision a more objective one.  相似文献   
998.
We investigate the time series properties of the daily and weekly returns from the Athens Stock Exchange (ASE) index for the years 1987 to 1997. We investigate whether important time-series characteristics have changed significantly over time. The Greek market has recently undergone major changes including complete capital flow liberalization, the implementation of computerized trading, as well as significant increases in market volume and capitalization; we thus contrast the 1987–90 and 1991–97 periods. Our findings suggest the dynamics of the ASE composite index returns have changed as the market has developed.  相似文献   
999.
1000.
When modeling the behavior of firms, marketers and micro-economists routinely confront complex problems of strategic interaction. In competitive environments, firms make strategic decisions that not only depend on the features of the market, but also on their beliefs regarding the reactions of their rivals. Structurally modeling these interactions requires formulating and estimating a discrete game, a task which, until recently, was considered intractable. Fortunately, two-step estimation methods have cracked the problem, fueling a growing literature in both marketing and economics that tackles a host of issues from the optimal design of ATM networks to the choice of pricing strategy. However, most existing methods have focused on only the discrete choice of actions, ignoring a wealth of information contained in post-choice outcome data and severely limiting the scope for performing informative counterfactuals or identifying the deep structural parameters that drive strategic decisions. The goal of this paper is to provide a method for incorporating post-choice outcome data into static discrete games of incomplete information. In particular, our estimation approach adds a selection correction to the two-step games approach, allowing the researcher to use revenue data, for example, to recover the costs associated with alternative actions. Alternatively, a researcher might use R&D expenses to back out the returns to innovation.  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