全文获取类型
收费全文 | 14281篇 |
免费 | 428篇 |
国内免费 | 15篇 |
专业分类
管理学 | 1834篇 |
民族学 | 90篇 |
人才学 | 1篇 |
人口学 | 1230篇 |
丛书文集 | 148篇 |
理论方法论 | 1369篇 |
综合类 | 695篇 |
社会学 | 7484篇 |
统计学 | 1873篇 |
出版年
2023年 | 77篇 |
2021年 | 112篇 |
2020年 | 222篇 |
2019年 | 287篇 |
2018年 | 364篇 |
2017年 | 505篇 |
2016年 | 349篇 |
2015年 | 288篇 |
2014年 | 342篇 |
2013年 | 2298篇 |
2012年 | 513篇 |
2011年 | 503篇 |
2010年 | 423篇 |
2009年 | 358篇 |
2008年 | 428篇 |
2007年 | 443篇 |
2006年 | 439篇 |
2005年 | 394篇 |
2004年 | 312篇 |
2003年 | 268篇 |
2002年 | 304篇 |
2001年 | 362篇 |
2000年 | 302篇 |
1999年 | 299篇 |
1998年 | 216篇 |
1997年 | 186篇 |
1996年 | 175篇 |
1995年 | 183篇 |
1994年 | 166篇 |
1993年 | 179篇 |
1992年 | 197篇 |
1991年 | 201篇 |
1990年 | 195篇 |
1989年 | 172篇 |
1988年 | 179篇 |
1987年 | 205篇 |
1986年 | 158篇 |
1985年 | 173篇 |
1984年 | 188篇 |
1983年 | 164篇 |
1982年 | 164篇 |
1981年 | 139篇 |
1980年 | 116篇 |
1979年 | 131篇 |
1978年 | 106篇 |
1977年 | 86篇 |
1976年 | 107篇 |
1975年 | 122篇 |
1974年 | 92篇 |
1972年 | 71篇 |
排序方式: 共有10000条查询结果,搜索用时 406 毫秒
921.
A class of decisions, asset mix decisions made by pension fund managers, which exhibit characteristics of both programmed and strategic choices is examined in this paper. The decisions are classified using the scheme developed by Mintzberg et al., (1976) to highlight the circumstances under which strategic decisions may be programmed. The types of strategic decisions which lend themselves to programming are considered. The advantages and disadvantages of programming strategic decisions are also discussed. 相似文献
922.
This article discusses a longitudinal study of firms selected for their expertise in environmental analysis. It is primarily designed to test two general propositions. The first, that environmental analysis is increasing in importance over time— both within and between firms; and the second, that environmental analysis is most viable as a separate, freestanding function within the organization. 相似文献
923.
R W Hart S C Freni D W Gaylor J R Gillette L K Lowry J M Ward E K Weisburger P Lepore A Turturro 《Risk analysis》1986,6(2):117-154
The Color Additives Scientific Review Panel considered whether there was information sufficient to perform a carcinogenic risk assessment on the colors D&C Red No. 19 (R-19), D&C Red No. 37 (R-37), D&C Orange No. 17 (O-17), D&C Red No. 9 (R-9), D&C Red No. 8 (R-8) and FD&C Red No. 3 (R-3) and to evaluate the assessments sent to FDA as part of the petitions for use of the colors for drug and external uses by the Cosmetic, Toiletry and Fragrance Association (CTFA). There is a lack of human data concerning the colors for making a human health assessment, so the assessments are based upon the extrapolation of animal data. The risk assessments are determined for exposure to single chemicals. Excluded from consideration are possible effects from exposure to multiple chemicals, such as co-carcinogenesis, promotion, synergism, antagonism, etc. In the light of recent efforts in establishing a consensus in risk assessment, the Panel has determined that the CTFA assessments for R-10, O-17, and R-9 are consistent with present acceptable usages, although it questions some of the assumptions used in the assessments. The Panel identified a number of general assumptions made, and discusses their validity, their impact on total uncertainty, and the potential options to address the gaps in understanding that necessitate the assumption. The Panel also derived revised risk estimates using more "reasonable" assumptions than "worst-case" situations, for 90th percentile and average exposure. For those assumptions that are easily quantifiable, the Panel's estimates are less than an order of magnitude lower than the CTFA risk estimates, indicating that the underestimates and overestimates of the CTFA risk estimates tend to balance each other. The impact of most of the assumptions is not quantifiable. The assessment for R-3 is complicated by the fact that there is no good skin penetrance study for this color. It was assumed that the penetrance is similar to that of another water-soluble xanthene color, R-19. It is expected that the absorption of the color is not likely to exceed that of the smaller molecule, R-19. Therefore, the risk estimates are similar to the CTFA estimates, but with different reasoning. The estimates for R-8 and R-37 are different from the others in that there is a lack of any exposure or toxicological information on these colors.(ABSTRACT TRUNCATED AT 400 WORDS) 相似文献
924.
Comparing Expressed and Revealed Preferences for Risk Reduction: Different Hazards and Question Frames 总被引:2,自引:0,他引:2
Timothy L. McDaniels 《Risk analysis》1988,8(4):593-604
Studies often note the wide differences that exist in costs per death avoided across U.S. federal programs and regulatory contexts. This paper explores two new, related explanations for these differences. First, it argues that the patterns of revealed preferences (public allocations) may be related to public values, which are measured here through subjects' expressed preference responses to a contingent valuation survey regarding risk reduction. Subjects' expressed values are compared to actual (and proposed) costs of safety regulations for a similar set of hazards. We discover strong congruence in the ranking of expressed values and actual values. Second, the paper presents the results of a subsequent survey that investigates why the patterns observed in the first survey might occur. It suggests that one reason for the observed similarities between revealed and expressed preferences may be in how choices are framed. The paper hypothesizes that both subjects and decision makers may frame valuation decisions in the same way: as percentage changes from the reference point provided by the base rate of deaths for that hazard. 相似文献
925.
Findings from studies that have investigated the relationship between task-relevant ability and turnover have been inconsistent. A process model is presented that suggests that ability may be related to turnover through the individual's perception of both the ease and desirability of movement. The potential effect of ability on the turnover process and its practical and theoretical implications are discussed. 相似文献
926.
Quantitative Approaches in Use to Assess Cancer Risk 总被引:4,自引:0,他引:4
Elizabeth L. Anderson 《Risk analysis》1983,3(4):277-295
927.
This paper surveys the application of U.K. monopoly policy and examines its general impact on industrial structure and market processes. It considers the effects of the Competition Act 1980 in relation to U.K. monopoly control and concludes that unless further measures are introduced, competitive pressures are likely to be weakened over the longer term. 相似文献
928.
The Effect of Firm and Host Country Characteristics on the Choice of Entry Mode: Empirical Evidence from Spanish Firms 总被引:2,自引:0,他引:2
When investing abroad firms must choose betweengoing alone or with a partner – the so-calledownership structure decision. Additionally,firms can enter a new country by acquisitionsor by greenfield investments – the foreignestablishment mode decision. These twodecisions have traditionally been analyzedseparately in the literature on entry mode.What is more, this literature has much lessanalyzed hybrid entry modes, like partialacquisitions. The aim of this paper is toanalyze how the different factors analyzed inprior research influence the choice of entrymode when jointly taking into account fouralternative entry modes: greenfield whollyowned subsidiaries, greenfield joint ventures,full acquisitions and partial acquisitions. Theempirical analysis was carried out byestimating a multinomial logit model over asample of FDIs made by Spanish firms. Ourresults also contribute to the knowledge ofspecific patterns in the choice of entry modeby firms from late investor countries, likeSpain. 相似文献
929.
A Corporate Culture Pattern to Manage Business Ethics 总被引:2,自引:0,他引:2
Enrique Claver Juan Llopis José L. Gascó 《International Journal of Value-Based Management》2002,15(1):151-163
Within the general frame of proposals for an adequate management of business ethics, this paper is based on the vision of
corporate culture as a pattern to achieve such purpose. If we consider ethics as a specific value of corporate culture, we
may resort to the mechanism of cultural change and implementation in order to manage ethics. Despite the difficulties it entails
in terms of time and money investment, this procedure is one of the safest ways to reach ethical values which are known, shared
and then practiced by all the members of a corporation, whatever the category. From this central standpoint, and basing ourselves
on our own proposal for the management of culture, we shall describe which specific steps must be taken in order to achieve
a set of ethical values which are both realistic and furthermore shared by all collaborators of an organization.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
930.
Laura Bragg, a member of the first graduating class at Simmons College, journeyed to Charleston as a New Woman in 1909. As the first woman director of a major scientific museum in the United States, Bragg transformed the Charleston Museum into a public education institution and became an innovative leader in museum education. This article documents Bragg's contributions within the context of antebellum culture where the Southern Belle was placed on a Victorian pedestal and Boston marriages were an unknown phenomenon. Using extensive and hitherto unpublished correspondence, the authors detail Bragg's lesbian relationships and describe her network within the homosexual male community during the era of the Charleston Renaissance. 相似文献