全文获取类型
收费全文 | 18742篇 |
免费 | 571篇 |
国内免费 | 8篇 |
专业分类
财政金融 | 3309篇 |
工业经济 | 1622篇 |
计划管理 | 3441篇 |
经济学 | 3777篇 |
综合类 | 871篇 |
运输经济 | 215篇 |
旅游经济 | 268篇 |
贸易经济 | 2559篇 |
农业经济 | 1109篇 |
经济概况 | 2113篇 |
信息产业经济 | 5篇 |
邮电经济 | 32篇 |
出版年
2023年 | 125篇 |
2022年 | 156篇 |
2021年 | 298篇 |
2020年 | 414篇 |
2019年 | 387篇 |
2018年 | 362篇 |
2017年 | 496篇 |
2016年 | 438篇 |
2015年 | 387篇 |
2014年 | 596篇 |
2013年 | 1648篇 |
2012年 | 1012篇 |
2011年 | 1347篇 |
2010年 | 1204篇 |
2009年 | 981篇 |
2008年 | 1072篇 |
2007年 | 936篇 |
2006年 | 981篇 |
2005年 | 905篇 |
2004年 | 455篇 |
2003年 | 493篇 |
2002年 | 451篇 |
2001年 | 385篇 |
2000年 | 312篇 |
1999年 | 255篇 |
1998年 | 219篇 |
1997年 | 242篇 |
1996年 | 196篇 |
1995年 | 185篇 |
1994年 | 168篇 |
1993年 | 160篇 |
1992年 | 145篇 |
1991年 | 136篇 |
1990年 | 121篇 |
1989年 | 109篇 |
1988年 | 97篇 |
1987年 | 111篇 |
1986年 | 77篇 |
1985年 | 124篇 |
1984年 | 152篇 |
1983年 | 135篇 |
1982年 | 114篇 |
1981年 | 87篇 |
1980年 | 98篇 |
1979年 | 87篇 |
1978年 | 66篇 |
1977年 | 63篇 |
1976年 | 62篇 |
1974年 | 50篇 |
1973年 | 45篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Quality & Quantity - Many ecological- and individual-level analyses of voting behaviour use multiple regressions with a considerable number of independent variables but few discussions of their... 相似文献
2.
3.
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
4.
5.
6.
Gregory Brown Robert Harris Wendy Hu Tim Jenkinson Steven N. Kaplan David T. Robinson 《Journal of Financial Economics》2021,139(2):561-577
Private equity performance, both for buyouts and venture capital, has been highly cyclical: periods of high fundraising have been followed by periods of low performance. Despite this seemingly predictable variation, we find modest gains, at best, to pursuing realistic, investable strategies that time capital commitments to private equity. This occurs, in part, because investors can only time their commitments to funds; they cannot time when commitments are called or when investments are exited. There is a high degree of time-series correlation in net cash flows even across commitment strategies that allocate capital in a very different manner over time. 相似文献
7.
This paper investigates not only the question of whether there is exchange rate pass‐through (ERPT) but also the extent to which the pass‐through is asymmetric or state‐dependent in the BRICS countries. Using monthly data from 1999:M1 to 2019:M12 and non‐linear smooth transition vector autoregressive (STVAR) model, our results provide evidence of period‐specific ERPT between the upper and lower regime periods, governed by the selected transition variables. The results further suggest that the pass‐through of exchange rate is higher when the economy is experiencing large appreciations and expansions as well as large depreciations and recessions. Theimplication for these findings is that ERPT is strongly affected by the state of the economy. 相似文献
8.
9.
Journal of Business Ethics - Airline pilots are attributed ultimate responsibility and final authority over their aircraft to ensure the safety and well-being of all its occupants. Yet, with the... 相似文献
10.
从市场经济体制的建立到经济社会高质量发展,我国不同部门市场化程度有所差异,劳动供给的部门异质性随之体现。基于中国劳动力动态调查数据,结合汉森门槛回归模型和劳动供给模型,依托部门市场化程度的差异性,文章探讨了工资对劳动力个人供给的非线性影响及其部门异质性。主要得出以下研究结论:第一,我国市场部门与公共部门劳动力的个人劳动供给有所差异。第二,工资与个人劳动供给呈现非线性关系并且存在部门异质性。实证分析结果显示,工资对个人劳动供给的影响存在三个"突变点",工资门槛均使得工资"激励效应"加强并呈现逐步增加的趋势。第三,劳动供给的工资门槛存在性别、城乡和行业异质性。第四,随着年龄增长、人力资本积累,个人劳动时间供给趋于降低,签署书面劳工合同使得市场部门劳动力工作时间显著增加,而政治面貌显著影响公共部门劳动供给。总体来看,无论是市场部门还是公共部门,我国劳动力个人供给曲线均未"向后弯曲",国民经济高质量发展、改善收入分配格局、提升居民幸福感等议题需持续关注。 相似文献