全文获取类型
收费全文 | 30284篇 |
免费 | 314篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 5173篇 |
工业经济 | 1922篇 |
计划管理 | 4841篇 |
经济学 | 6793篇 |
综合类 | 650篇 |
运输经济 | 98篇 |
旅游经济 | 209篇 |
贸易经济 | 6727篇 |
农业经济 | 711篇 |
经济概况 | 2854篇 |
信息产业经济 | 45篇 |
邮电经济 | 576篇 |
出版年
2021年 | 76篇 |
2020年 | 151篇 |
2019年 | 197篇 |
2018年 | 2490篇 |
2017年 | 2254篇 |
2016年 | 1426篇 |
2015年 | 264篇 |
2014年 | 345篇 |
2013年 | 1419篇 |
2012年 | 807篇 |
2011年 | 2342篇 |
2010年 | 2187篇 |
2009年 | 1921篇 |
2008年 | 1841篇 |
2007年 | 2221篇 |
2006年 | 417篇 |
2005年 | 648篇 |
2004年 | 732篇 |
2003年 | 824篇 |
2002年 | 570篇 |
2001年 | 315篇 |
2000年 | 342篇 |
1999年 | 249篇 |
1998年 | 271篇 |
1997年 | 262篇 |
1996年 | 266篇 |
1995年 | 215篇 |
1994年 | 227篇 |
1993年 | 218篇 |
1992年 | 265篇 |
1991年 | 243篇 |
1990年 | 197篇 |
1989年 | 173篇 |
1988年 | 159篇 |
1987年 | 209篇 |
1986年 | 214篇 |
1985年 | 280篇 |
1984年 | 299篇 |
1983年 | 280篇 |
1982年 | 249篇 |
1981年 | 249篇 |
1980年 | 237篇 |
1979年 | 256篇 |
1978年 | 160篇 |
1977年 | 148篇 |
1976年 | 104篇 |
1975年 | 141篇 |
1974年 | 99篇 |
1973年 | 96篇 |
1971年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Mark D. Karper Clifford B. Donn Marie E. Lyndaker 《Employee Responsibilities and Rights Journal》1994,7(3):219-233
The maritime industry provides an interesting case study of the design and implementation of drug-testing programs in the
transportation industry during the 1980s. It is clear that such programs were designed and implemented less because of empirical
evidence of safety problems than for political reasons. The results in the maritime industry are indicative of a program that
is expensive to operate, intrusive with regard to employee privacy, and which will have little or no impact on safety. Focusing
such programs on the issue of impairment rather than on the issue of drug usage per se is likely to improve the outcome of
the programs.
Although, despite common belief, there is little evidence that drug usage or the “drug problem” in U.S. society as a whole
had gotten worse in the preceding years (Schonsheck, 1989, 250–251). 相似文献
82.
Prior to making important decisions, marketing managers go through an evaluation process in which available alternatives are
compared. Yet, no systematic discussion of the evaluation process exists in the marketing literature. This article reviews
the marketing and behavioral decision theory literature in order to identify factors that may cause errors in the two fundamental
elements of the evaluation process—the estimation of probabilities and the determination of the value of outcomes. Propositions
are developed that specify circumstances in which marketing management decisions may be influenced by judgmental biases, and
procedures are identified for debiasing such judgments. 相似文献
83.
Tracking programs have been criticized on the grounds that they harm disadvantaged children. The bulk of empirical research supports this view, but existing studies compare outcomes across students placed in different tracks. Track placement is likely to be endogenous with respect to student outcomes. We use a new strategy for overcoming the endogeneity of track placement and find no evidence that tracking hurts low-ability children. Previous studies have also been based on the assumption that students' enrollment decisions are unrelated to whether or not the school tracks. When we account for the possibility that tracking programs affect school choice, we find evidence that they may help low-ability children. 相似文献
84.
85.
86.
Summary. This research studies the role of multivariate distribution structures on random asset returns in determining the optimal
allocation vector for an expected utility maximizer. All our conclusions pertain for the set of risk averters. By carefully
disturbing symmetry in the distribution of the, possibly covarying, returns, we ascertain the ordinal structure of the optimized
allocation vector. Rank order of allocations is also established when a permutation symmetric random vector is mapped into
the returns vector through location and scale shifts. It is shown that increased dispersion in the vectors of location and
scale parameters benefit, ex-ante, investors as does a decrease in the rank correlation coefficient between the location and
scale parameter vectors. Revealed preference comparative static results are identified for the location and scale vectors
of asset returns. For most issues addressed, we arrive at much stronger inferences when a safe asset is available.
Received: August 8, 2000; revised version: January 8, 2001 相似文献
87.
88.
Considerable experimental evidence suggests that non-pecuniary motives must be addressed when modeling behavior in economic contexts. Recent theories of non-pecuniary motives can be classified as altruism-, equity-, or reciprocity-based. We outline the qualitative differences in prediction these alternative explanations yield in a gift-exchange game. We estimate and compare leading approaches in these categories, using experimental data. We then offer a flexible approach that nests the above three approaches, thereby allowing for nested hypothesis testing and for determining the relative strength of each of the competing theories. In addition, the encompassing approach provides a functional form for utility in different settings without the restrictive nature of the approaches nested within it. Using this flexible form for nested tests, we find that intentional reciprocity, distributive concerns, and altruistic considerations all play a significant role in players' decisions. 相似文献
89.
90.