全文获取类型
收费全文 | 136000篇 |
免费 | 3865篇 |
国内免费 | 14篇 |
专业分类
财政金融 | 25527篇 |
工业经济 | 11553篇 |
计划管理 | 21697篇 |
经济学 | 29263篇 |
综合类 | 1538篇 |
运输经济 | 969篇 |
旅游经济 | 2501篇 |
贸易经济 | 23511篇 |
农业经济 | 6186篇 |
经济概况 | 16876篇 |
信息产业经济 | 7篇 |
邮电经济 | 251篇 |
出版年
2021年 | 842篇 |
2020年 | 1620篇 |
2019年 | 2378篇 |
2018年 | 2301篇 |
2017年 | 2512篇 |
2016年 | 2694篇 |
2015年 | 2101篇 |
2014年 | 3418篇 |
2013年 | 15293篇 |
2012年 | 4193篇 |
2011年 | 4134篇 |
2010年 | 3714篇 |
2009年 | 4311篇 |
2008年 | 3930篇 |
2007年 | 3263篇 |
2006年 | 3597篇 |
2005年 | 3596篇 |
2004年 | 3127篇 |
2003年 | 2895篇 |
2002年 | 2858篇 |
2001年 | 2634篇 |
2000年 | 2545篇 |
1999年 | 2436篇 |
1998年 | 2310篇 |
1997年 | 2349篇 |
1996年 | 2194篇 |
1995年 | 2000篇 |
1994年 | 2007篇 |
1993年 | 1975篇 |
1992年 | 2034篇 |
1991年 | 1940篇 |
1990年 | 1826篇 |
1989年 | 1678篇 |
1988年 | 1606篇 |
1987年 | 1608篇 |
1986年 | 1693篇 |
1985年 | 2478篇 |
1984年 | 2345篇 |
1983年 | 2153篇 |
1982年 | 2004篇 |
1981年 | 1939篇 |
1980年 | 1902篇 |
1979年 | 1845篇 |
1978年 | 1629篇 |
1977年 | 1618篇 |
1976年 | 1384篇 |
1975年 | 1274篇 |
1974年 | 1187篇 |
1973年 | 1186篇 |
1972年 | 895篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
251.
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
252.
253.
This article investigates the determinants of real estate investment trusts (REIT) portfolio investment and institutional REIT ownership using multivariate Tobit regressions. We contend that many institutional investors take larger positions in more liquid assets like REIT stocks, as compared with private real estate equities, because of liquidity considerations. Consistent with this contention, we find that liquidity constraints are significantly related to REIT portfolio investment by institutional investors. We also find that institutional investors have different preferences for REIT stocks than do other investors; they generally prefer larger, more liquid REIT stocks. 相似文献
254.
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
255.
Transdisciplinarity: Context, contradictions and capacity 总被引:1,自引:0,他引:1
256.
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
257.
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
258.
259.
This paper focuses on the development of a theoretical scheme describing the transformation of primary incomes into end consumption and savings in the Russian economy. This scheme is basically a system of interrelated tables reflecting the distribution of primary incomes across the institutional sectors and their further reallocation and use. The scheme makes allowances for the specific features of the Russian economy and existing statistics. In terms of methodology, it is coordinated with the interindustry balance in current buyer prices and, from the theoretical standpoint, describes the connection between Quadrant II and Quadrant III of the balance. Therefore, the proposed system of tables is treated in the paper as Quadrant IV of the interindustry balance. The theoretical scheme is used by the authors as a necessary basis for constructing an empirical model of the relationship between value added and end product, which will be published in the next issue of this journal. 相似文献
260.
Companies in the United States are concerned with retaining minority employees to maintain or increase the diversity of their workforce. Here we assess the value of one approach companies have used to retain minority employees: “network” groups. Based on data obtained from a large company with extensive network groups, this study compares the turnover intentions of minority employees who have joined one of the company's network groups to those who have not joined one of the company's network groups. The data show that employee network groups can be useful in helping companies retain managerial‐level minority employees. Extensive recommendations are provided to help organizations maximize the effectiveness of network groups. © 2002 Wiley Periodicals, Inc. 相似文献