全文获取类型
收费全文 | 27967篇 |
免费 | 521篇 |
专业分类
财政金融 | 4957篇 |
工业经济 | 2025篇 |
计划管理 | 4433篇 |
经济学 | 6347篇 |
综合类 | 887篇 |
运输经济 | 148篇 |
旅游经济 | 315篇 |
贸易经济 | 4495篇 |
农业经济 | 1113篇 |
经济概况 | 3672篇 |
信息产业经济 | 3篇 |
邮电经济 | 93篇 |
出版年
2021年 | 118篇 |
2020年 | 241篇 |
2019年 | 355篇 |
2018年 | 1008篇 |
2017年 | 1067篇 |
2016年 | 767篇 |
2015年 | 294篇 |
2014年 | 507篇 |
2013年 | 2285篇 |
2012年 | 709篇 |
2011年 | 1287篇 |
2010年 | 1092篇 |
2009年 | 1108篇 |
2008年 | 1069篇 |
2007年 | 1110篇 |
2006年 | 446篇 |
2005年 | 542篇 |
2004年 | 562篇 |
2003年 | 650篇 |
2002年 | 502篇 |
2001年 | 480篇 |
2000年 | 528篇 |
1999年 | 447篇 |
1998年 | 432篇 |
1997年 | 452篇 |
1996年 | 411篇 |
1995年 | 372篇 |
1994年 | 393篇 |
1993年 | 452篇 |
1992年 | 433篇 |
1991年 | 407篇 |
1990年 | 392篇 |
1989年 | 335篇 |
1988年 | 325篇 |
1987年 | 316篇 |
1986年 | 348篇 |
1985年 | 428篇 |
1984年 | 470篇 |
1983年 | 418篇 |
1982年 | 395篇 |
1981年 | 422篇 |
1980年 | 374篇 |
1979年 | 406篇 |
1978年 | 330篇 |
1977年 | 309篇 |
1976年 | 275篇 |
1975年 | 213篇 |
1974年 | 219篇 |
1973年 | 214篇 |
1972年 | 153篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Gary V. Engelhardt Michael D. Eriksen Nadia Greenhalgh‐Stanley 《Real Estate Economics》2019,47(4):1055-1088
We examine the extent to which parents use housing and shared living arrangements as a form of risk‐sharing for their adult children, using detailed data on children and parents in the Health and Retirement Study for 1998–2012. On average, a young man moving from full‐time to nonemployment raises the likelihood of coresiding with a parent by 1.5 percentage points; moving from full‐time employment to being part‐time employed raises the likelihood of coresiding with a parent by 2 percentage points. The implied elasticity of parental coresidence with respect to the son's income is ‐1.1; for daughters, the elasticity is ‐0.5. 相似文献
32.
This paper applies the Least Absolute Shrinkage and Selection Operator (LASSO) to make rolling one‐minute‐ahead return forecasts using the entire cross‐section of lagged returns as candidate predictors. The LASSO increases both out‐of‐sample fit and forecast‐implied Sharpe ratios. This out‐of‐sample success comes from identifying predictors that are unexpected, short‐lived, and sparse. Although the LASSO uses a statistical rule rather than economic intuition to identify predictors, the predictors it identifies are nevertheless associated with economically meaningful events: the LASSO tends to identify as predictors stocks with news about fundamentals. 相似文献
33.
D. R. Myddelton 《Economic Affairs》2003,23(1):2-6
Major tax reform to simplify the UK tax system is possible. Merging income taxes, social security taxes and corporation tax into only a single flat-rate of tax on all incomes would be a radical start. Avoiding taxes on income and expenditure which are 'too high' requires major reductions in government spending, mainly on the welfare state. Given the political will, over a period of years we really can hugely improve the UK tax system. 相似文献
34.
35.
This study explores relationships between race, gender, agreeableness, openness to experience, contact, and a measure of attitudes toward diversity—universal‐diverse orientation (UDO). UDO consists of three attitudinal components: realistic appreciation (a cognition), comfort with difference (a feeling), and diversity of contact (a behavior). Results suggest that race, agreeableness, and openness relate to UDO attitudes, primarily due to the relationships of these variables with the behavioral component—diversity of contact. Identifying characteristics of tolerant people (e.g., agreeableness) and training managers in skills related to those characteristics may improve contextual performance and make managers better role models within the organizational context. © 2003 Wiley Periodicals, Inc. 相似文献
36.
37.
38.
L. Zhang Simon X. B. Zhao J. P. Tian 《International journal of urban and regional research》2003,27(4):912-937
This article focuses on the housing issues of rural migrants arising from urbanization, with particular reference to chengzhongcun, a topic with considerable impact on policymaking. An attempt is made to understand the underlying rationale of self‐help in housing and the important role of chengzhongcun in sheltering rural migrants in the context of China's rural‐urban dichotomy. As demonstrated in this study, chengzhongcun accommodate, with little in the way of government resources and assistance, millions of rural migrants because of their social accessibility and affordability. While not denying their social problems, we argue that chengzhongcun in fact act as an innovative and positive agent to promote urbanization in present day China by housing massive numbers of rural migrants and assimilating them into cities. Current government policies towards chengzhongcun have generated a wide range of interest conflicts and confrontations. The consequences of such conflicts show that the government policies were problematic and unworkable, as they violated basic market principles as well as citizen rights. Policy strategy towards the redevelopment of chengzhongcun must acknowledge their credibility in the Chinese road to urbanization and requires more thoughtful and prudent consideration of migrants' demands for affordable housing. 相似文献
39.
40.
We consider the problem of estimating a probability density function based on data that are corrupted by noise from a uniform distribution. The (nonparametric) maximum likelihood estimator for the corresponding distribution function is well defined. For the density function this is not the case. We study two nonparametric estimators for this density. The first is a type of kernel density estimate based on the empirical distribution function of the observable data. The second is a kernel density estimate based on the MLE of the distribution function of the unobservable (uncorrupted) data. 相似文献