全文获取类型
收费全文 | 2224篇 |
免费 | 76篇 |
专业分类
财政金融 | 471篇 |
工业经济 | 205篇 |
计划管理 | 409篇 |
经济学 | 477篇 |
综合类 | 27篇 |
运输经济 | 16篇 |
旅游经济 | 85篇 |
贸易经济 | 379篇 |
农业经济 | 108篇 |
经济概况 | 118篇 |
邮电经济 | 5篇 |
出版年
2023年 | 10篇 |
2021年 | 16篇 |
2020年 | 43篇 |
2019年 | 55篇 |
2018年 | 64篇 |
2017年 | 56篇 |
2016年 | 44篇 |
2015年 | 34篇 |
2014年 | 56篇 |
2013年 | 281篇 |
2012年 | 72篇 |
2011年 | 63篇 |
2010年 | 70篇 |
2009年 | 84篇 |
2008年 | 77篇 |
2007年 | 73篇 |
2006年 | 75篇 |
2005年 | 57篇 |
2004年 | 63篇 |
2003年 | 59篇 |
2002年 | 52篇 |
2001年 | 49篇 |
2000年 | 55篇 |
1999年 | 65篇 |
1998年 | 56篇 |
1997年 | 41篇 |
1996年 | 32篇 |
1995年 | 46篇 |
1994年 | 36篇 |
1993年 | 31篇 |
1992年 | 26篇 |
1991年 | 33篇 |
1990年 | 20篇 |
1989年 | 16篇 |
1988年 | 19篇 |
1987年 | 27篇 |
1986年 | 17篇 |
1985年 | 34篇 |
1984年 | 26篇 |
1983年 | 39篇 |
1982年 | 25篇 |
1981年 | 20篇 |
1980年 | 28篇 |
1979年 | 20篇 |
1978年 | 23篇 |
1977年 | 17篇 |
1976年 | 14篇 |
1974年 | 16篇 |
1973年 | 13篇 |
1972年 | 10篇 |
排序方式: 共有2300条查询结果,搜索用时 250 毫秒
1.
Objective: This study was to determine if calcium fortification yields a higher price per serving in grocery store products. Researchers compared store brand to national brand grocery products in relation to cost in order to examine if calcium values were similar between store brand and national brand products. Methods: A total of 112 store brand and 211 national brand grocery products were collected from three low (national chain store), middle and high priced (Virginia and North Carolina regional store) grocery venues. Products were compared using price and calcium percentage per serving. ANOVA was used to determine between store brand and national brand for price per serving and calcium content, and between grocery venues. Results: National brand fortified products had a significantly lower mean price per serving when compared to national brand non-fortified products (p = 0.0002). There was no statistical difference between store brand fortified and non-fortified products (p = 0.9256). Low priced store brand products had the lowest mean price per serving ($0.34 ±0.24). Conclusions: This study found store brand products have similar calcium content as national brand products. Product cost was lower at low priced store compared to middle and high priced stores. 相似文献
2.
Christopher Smith Linda Duxbury Michael Halinski 《Human Resource Management Journal》2019,29(3):371-394
The lack of a validated measure of active–passive union participation and a dearth of research into the relationship between generational cohort and union participation challenge union leaders to develop policies and practices to facilitate union renewal. We address these issues by (a) developing a multidimensional measure of union participation that captures both active and passive components, (b) using structural equation modelling to validate the measure within a nomological framework, and (c) investigating the impact of generational cohort on all paths in our framework. Data from members of a large American union confirm that generational cohort influences how union members participate in their union. The two‐factor measure developed in this study facilitates research into antecedents and outcomes of passive and active union participation. Our findings should also prove useful to unions seeking to increase participation within their membership, academics researching unions and generational cohort, and human resource practitioners operating in unionised environments. 相似文献
3.
Rubén Loaiza‐Maya Michael S. Smith Worapree Maneesoonthorn 《Journal of Applied Econometrics》2018,33(3):332-354
We propose parametric copulas that capture serial dependence in stationary heteroskedastic time series. We suggest copulas for first‐order Markov series, and then extend them to higher orders and multivariate series. We derive the copula of a volatility proxy, based on which we propose new measures of volatility dependence, including co‐movement and spillover in multivariate series. In general, these depend upon the marginal distributions of the series. Using exchange rate returns, we show that the resulting copula models can capture their marginal distributions more accurately than univariate and multivariate generalized autoregressive conditional heteroskedasticity models, and produce more accurate value‐at‐risk forecasts. 相似文献
4.
5.
A BSTRACT . In his The Construction of Social Reality , Searle presents an account of rights, responsibilities, obligations, duties, and similar entities in terms of the formula X counts as Y in context C , where " X " refers in the simplest case to some physical object or event and " Y " to the result of imposing upon X some deontic power or function. Smith attempts to show the limitations of this formula, focusing especially on the examples of contested property rights (where C is not uniquely defined), and of money in bank accounts and other phenomena (where no physical X -term is available). Searle responds to these criticisms, above all by pointing to the fact that some of the problems Smith raises are to be addressed not by an ontological analysis of social reality but rather through legal or political means. 相似文献
6.
Ian Smith 《Journal of economic surveys》2003,17(2):201-226
Growth in property ownership has raised the stakes in the distribution of financial assets on divorce. Given high risks of marital failure, this has stimulated the demand for private ordering through enforceable marriage contracts. This paper surveys the existing law and economics literature and legal practice to consider the state of knowledge on the economic theory, scope and limits of written nuptial agreements. 相似文献
7.
This paper examines the variables that determine the performance of countries at the Olympic Games as measured by a weighted sum of the medals won at the Sydney 2000 Games. While previous studies have identified the importance of a country's economic size and the resources available to sport, this paper examines nine more variables including the number of athletes representing each nation and some development indicators. Based on 2310 regressions, both traditional and restricted extreme bounds analysis show that only two variables are robust: the number of athletes and national expenditure on health. Thus, the final model recognises four explanatory variables that include these two as well as GDP and population. 相似文献
8.
We empirically investigate the interactions among hedging, financing, and investment decisions. We argue that the way in which hedging affects a firm's financing and investing decisions differs for firms with different growth opportunities. We find that high growth firms increase their investment, but not leverage, by hedging. However, we also find that firms with few investment opportunities use derivatives to increase their leverage. 相似文献
9.
S K Smith 《Journal of economic and social measurement》1986,14(1):37-49
As the elderly population of the United States grows in absolute number and as a proportion of total population, accurate projections of that population become increasingly important for sound policy decisions. Cohort component techniques are typically used for state and local projections of the elderly population, but are often outdated or even nonexistent for many local areas. This paper suggests an alternative approach, based on Medicare data and simple projection techniques. Projections for several base periods and projection horizons are made for all states and for counties in Florida and are compared with actual Medicare enrollment. On the basis of these comparisons it appears that Medicare data and simple projection techniques can produce very useful short-run projections of the elderly population for states and local areas. 相似文献
10.
William R. Dillon Ulf Böckenholt Melinda Smith de Borrero Ham Bozdogan Wayne de Sarbo Sunil Gupta Wagner Kamakura Ajith Kumar Benkatram Ramaswamy Michael Zenor 《Marketing Letters》1994,5(4):323-334
Our paper provides a brief review and summary of issues and advances in the use of latent structure and other finite mixture models in the analysis of choice data. Focus is directed to three primary areas: (1) estimation and computational issues, (2) specification and interpretation issues, and (3) future research issues. We comment on what latent structure models have promised, what has been, to date, delivered, and what we should look forward to in the future. 相似文献