全文获取类型
收费全文 | 7649篇 |
免费 | 225篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 1503篇 |
工业经济 | 697篇 |
计划管理 | 1255篇 |
经济学 | 1539篇 |
综合类 | 88篇 |
运输经济 | 72篇 |
旅游经济 | 139篇 |
贸易经济 | 1616篇 |
农业经济 | 314篇 |
经济概况 | 601篇 |
信息产业经济 | 1篇 |
邮电经济 | 51篇 |
出版年
2023年 | 51篇 |
2022年 | 41篇 |
2021年 | 83篇 |
2020年 | 126篇 |
2019年 | 201篇 |
2018年 | 202篇 |
2017年 | 232篇 |
2016年 | 262篇 |
2015年 | 186篇 |
2014年 | 229篇 |
2013年 | 859篇 |
2012年 | 347篇 |
2011年 | 362篇 |
2010年 | 307篇 |
2009年 | 330篇 |
2008年 | 257篇 |
2007年 | 255篇 |
2006年 | 231篇 |
2005年 | 199篇 |
2004年 | 193篇 |
2003年 | 207篇 |
2002年 | 174篇 |
2001年 | 168篇 |
2000年 | 150篇 |
1999年 | 148篇 |
1998年 | 142篇 |
1997年 | 117篇 |
1996年 | 108篇 |
1995年 | 109篇 |
1994年 | 102篇 |
1993年 | 89篇 |
1992年 | 95篇 |
1991年 | 83篇 |
1990年 | 82篇 |
1989年 | 74篇 |
1988年 | 70篇 |
1987年 | 58篇 |
1986年 | 82篇 |
1985年 | 94篇 |
1984年 | 89篇 |
1983年 | 68篇 |
1982年 | 92篇 |
1981年 | 63篇 |
1980年 | 65篇 |
1979年 | 53篇 |
1978年 | 52篇 |
1977年 | 46篇 |
1976年 | 43篇 |
1975年 | 30篇 |
1972年 | 25篇 |
排序方式: 共有7876条查询结果,搜索用时 15 毫秒
991.
Y. P. Adegbola N. R. Ahoyo Adjovi S. A. Adekambi R. Zossou E. S. Sonehekpon F. Assogba Komlan 《国际粮食与农业综合企业市场学杂志》2019,31(1):1-21
Constraints related to the technical and socioeconomic aspects of adopting tomato varieties are well documented. However, preferences relating to the demand for this fruit are rarely studied. In fact, demand for the different varieties of tomatoes might be related to consumers’ preferences for the extrinsic (color, size) and intrinsic (taste, nutritive value, water content) characteristics specific to each variety. It is therefore indispensable to determine the characteristics of tomatoes preferred by consumers. We examine consumers’ preferences for tomato attributes among a sample of 600 consumers in four representative markets in the main cities in southern Benin. The study also identifies potential segments of consumers and the market shares of each profile for each segment. The study identifies four potential tomato market segments, two of which have a strong preference for local tomatoes, namely, those that can be conserved for long periods and those with a firm consistency. 相似文献
992.
This paper focuses on the sources of intra‐industry price variability in US food industries during a period of increasing concentration, while accounting for the impact of variations in prices of primary agricultural products. Results suggest that intra‐industry price variability in food industries increases with their respective mean rate of inflation and product heterogeneity. However, industrial concentration lowers the sensitivity of relative prices to changes in the mean rate of inflation. Hence, static welfare losses to consumers from increasing concentration in food industries, a subject of recent and intensive investigation, can partly be offset by gains such as reduced price variability. 相似文献
993.
994.
Czerniak TA 《Healthcare financial management》2012,66(6):134-138
When addressing locations of facilities after acquiring physician practices, hospitals should: Acknowledge the hospital's ambulatory plan is the driver rather than real estate assumed with the physician practices, Review the hospital ambulatory service plan for each submarket, Review the location of facilities within the service area and their proximity to one another, Sublease or sell existing facilities that are not appropriate, Ensure that the size and characteristics of each facility in the market are appropriate and consistent with the hospital's image. 相似文献
995.
Nikodem Szumilo Pascal Gantenbein Werner Gleißner Thomas Wiegelmann 《Journal of Property Research》2016,33(1):1-17
This paper presents a theoretical framework for an assessment and valuation of real estate assets and funds, based on modern stochastic discounted cash flow (DCF) models, which accurately captures the nature of related risks. We show that an accurate risk-adjusted valuation is particularly difficult for real estate investments, due to practical limits to diversification and difficulties in approximating total risk with systematic risk. We develop a risk assessment framework that includes idiosyncratic risk but focuses on insolvency risk related to a specific cash flow profile. We also present a methodology of rating this risk, using forecasts and simulations. We conclude that simulation techniques are a valuable tool in property risk assessment. Further, we show that cost of capital and value of assets depend on diversification of specific risks, investors can achieve in their portfolios. 相似文献
996.
Chen Jeng-Hong Jiang Christine X. Kim Jang-Chul McInish Thomas H. 《Review of Quantitative Finance and Accounting》2003,21(4):303-321
Using a sample of closed-end equity funds listed on the NYSE from 1994 to 1999, we investigate differences in spreads and adverse selection costs between the closed-end funds and a matched sample of common stocks. We find that spreads and adverse selection costs for the closed-end funds are significantly lower than those of control stocks. The results are consistent for the subperiods both before and after the minimum tick size change on NYSE on June 24, 1997. The differences of spreads and adverse selection costs cannot be attributed to the differences in the characteristics of the closed-end funds and the matched sample of common stocks. Lastly, we find that abnormal investor sentiment and adverse selection costs of closed-end funds are positively correlated over time. 相似文献
997.
This article provides a model-based analysis of the French spot market for electricity. Therefore a cost optimizing dispatch model is applied in order to derive a broader understanding of the liberalized electricity market in France considering empirical spot market prices in 2009. At first analysis of market structure and power plant mix is done in accordance with the european framework. The state of supply side competition is suggested as well. Due to the high portion of nuclear energy in the French energy mix the technical availability forecast of the plants plays a crucial role during the price formation on the wholesale market. As a result prices determined by the model are highly correlated with the French spot market. The results suggest a functioning pricing mechanism although deviations occur by ex-ante uncertain demand or unscheduled non-usability of generating units. 相似文献
998.
Ignoring the effects of inflation in retirement planning can have severe consequences for an individual's future financial well-being. Yet, many pension funds do not communicate inflation-related information, presumably for the fear of reduced contributions once the members understand how low the “real” return on saving for retirement is. As an alternative prediction, the provision of inflation information could increase pension contributions, because it reveals possible pension shortfalls. In cooperation with a major German pension fund, we conduct a field experiment, in which we vary the inflation information provided to the fund members, to explore this important issue. Among all participants, we find mostly positive but insignificant effects of the inflation information on pension contributions. Among those participants who voluntarily changed their pension contributions after the experimental intervention, the provision of inflation information significantly raises the likelihood of increasing pension contributions. 相似文献
999.
1000.
There is an increasing policy interest in pesticide taxation schemes as a measure to reduce harmful effects of pesticide use. The effectiveness of such tax depends, however, on the price elasticity of demand for pesticides. Moreover, information on these demand elasticities and their determinants is of crucial relevance for policy‐making and normative modeling approaches. In this article, we present a meta‐analysis based on studies that have estimated pesticide demand elasticities in Europe and North America. Our meta‐analysis reveals that the own‐price elasticities of demand for pesticides are, with a median of ?0.28, significantly smaller than zero, but also significantly larger than ?1, i.e. to be inelastic. We find that the demand for pesticides for special crops is less elastic than that for arable and grassland. In addition, the demand for herbicides is more elastic than for other pesticides. Studies that consider only short‐term horizons and little flexibility for farmers to adjust to price changes generate significantly less elastic pesticide demands. The results also indicate that more recent studies identify lower pesticide price elasticities of demand. Furthermore, we find that peer‐reviewed studies tend to find more inelastic results compared to grey literature. 相似文献