全文获取类型
收费全文 | 140613篇 |
免费 | 3291篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 26428篇 |
工业经济 | 11747篇 |
计划管理 | 22343篇 |
经济学 | 30510篇 |
综合类 | 1499篇 |
运输经济 | 980篇 |
旅游经济 | 2529篇 |
贸易经济 | 24117篇 |
农业经济 | 6237篇 |
经济概况 | 17251篇 |
信息产业经济 | 8篇 |
邮电经济 | 256篇 |
出版年
2021年 | 868篇 |
2020年 | 1672篇 |
2019年 | 2461篇 |
2018年 | 2445篇 |
2017年 | 2623篇 |
2016年 | 2797篇 |
2015年 | 2148篇 |
2014年 | 3471篇 |
2013年 | 15595篇 |
2012年 | 4345篇 |
2011年 | 4338篇 |
2010年 | 3865篇 |
2009年 | 4483篇 |
2008年 | 4082篇 |
2007年 | 3432篇 |
2006年 | 3699篇 |
2005年 | 3691篇 |
2004年 | 3222篇 |
2003年 | 3009篇 |
2002年 | 2932篇 |
2001年 | 2736篇 |
2000年 | 2649篇 |
1999年 | 2523篇 |
1998年 | 2413篇 |
1997年 | 2437篇 |
1996年 | 2306篇 |
1995年 | 2090篇 |
1994年 | 2087篇 |
1993年 | 2034篇 |
1992年 | 2094篇 |
1991年 | 2023篇 |
1990年 | 1897篇 |
1989年 | 1716篇 |
1988年 | 1645篇 |
1987年 | 1656篇 |
1986年 | 1732篇 |
1985年 | 2518篇 |
1984年 | 2378篇 |
1983年 | 2174篇 |
1982年 | 2027篇 |
1981年 | 1958篇 |
1980年 | 1925篇 |
1979年 | 1867篇 |
1978年 | 1660篇 |
1977年 | 1645篇 |
1976年 | 1405篇 |
1975年 | 1293篇 |
1974年 | 1196篇 |
1973年 | 1196篇 |
1972年 | 903篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
83.
If actively managed mutual funds suffer from diminishing returns to scale, funds should alter investment behavior as assets under management increase. Although asset growth has little effect on the behavior of the typical fund, we find that large funds and small‐cap funds diversify their portfolios in response to growth. Greater diversification, especially for small‐cap funds, is associated with better performance. Fund family growth is related to the introduction of new funds that hold different stocks from their existing siblings. Funds with many siblings diversify less rapidly as they grow, suggesting that the fund family may influence a fund's portfolio strategy. 相似文献
84.
This paper examines the spatial patterns of unemployment in Chicago between 1980 and 1990. We study unemployment clustering with respect to different social and economic distance metrics that reflect the structure of agents' social networks. Specifically, we use physical distance, travel time, and differences in ethnic and occupational distribution between locations. Our goal is to determine whether our estimates of spatial dependence are consistent with models in which agents' employment status is affected by information exchanged locally within their social networks. We present non‐parametric estimates of correlation across Census tracts as a function of each distance metric as well as pairs of metrics, both for unemployment rate itself and after conditioning on a set of tract characteristics. Our results indicate that there is a strong positive and statistically significant degree of spatial dependence in the distribution of raw unemployment rates, for all our metrics. However, once we condition on a set of covariates, most of the spatial autocorrelation is eliminated, with the exception of physical and occupational distance. Racial and ethnic composition variables are the single most important factor in explaining the observed correlation patterns. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
85.
86.
Where the quality (both competence and independence) of an audit is tested, often in the circumstance of a corporate failure, auditors frequently have good defences as to their competency but rarely do they have equally convincing defences for the objectivity of their decisionmaking or the independence of their audit. This paper recommends that large audit firms establish an independence board with the authority to define, review and decide upon all threats and potential threats to independence. It would also have responsibility for quality-control and educational programs in respect of audit firm's independence decision-making. 相似文献
87.
Transdisciplinarity: Context, contradictions and capacity 总被引:1,自引:0,他引:1
88.
Keith H. Coble Thomas O. Knight George F. Patrick & Alan E. Baquet 《Review of Agricultural Economics》2002,24(2):309-321
A survey conducted in Mississippi, Texas, Indiana, and Nebraska elicited producers' preferences for various farm policy changes. This permitted examination of the diversity of preferences that single-state studies have not allowed. Five policy choices, including deficiency payments, loan programs, crop insurance, export programs, and disaster payments were examined. Logit model results predicting producer preferences for each of the five dichotomous policy choices are reported. Explanatory variables based on expected utility theory such as risk aversion, price and yield variability, and price–yield correlation are significant in various models. 相似文献
89.
This paper develops and estimates models of family and sex-specific emigration, as well as the sex composition of this emigration, from 12 European source countries to the U.S. for the period 1870–1910. The models are based on the distinction between economic migrants (males, single females, and some married females) and tied or trailing migrants (females) and are estimated with panel data, including data that relate to the occupational/industrial structure of male and female economic activity in source countries. Hausman-Taylor instrumental variable estimates suggest that although both males and females responded to labor-market signals, males were more responsive than females to per capita GDP differences. Moreover, compared to the rest of Europe, Ireland, and Scandinavia were the sources of many young, single male, and female migrants, who responded strongly to gaps in economic opportunities. In fact, much of the European response to such gaps appears to be due to migrants from Ireland and Scandinavia. Females tended to originate in English-speaking countries and countries that were agriculturally oriented. Service and manufacturing jobs in source countries discouraged the migration of females relative to males. Males tended to follow recent migrants more than females, but females responded more to long-term influences as measured by stocks of migrants from their source countries who had previously settled in the U.S. Countries with high birth rates had relatively fewer female emigrants, whereas those with high rates of natural increase 20 years earlier experienced relatively more male emigration. Intact families, other family members (including family-strategy male migrants and trailing female migrants), and single males and females responded strongly to economic incentives, but the singles were most responsive followed by family-strategy males. 相似文献
90.