全文获取类型
收费全文 | 270篇 |
免费 | 11篇 |
专业分类
财政金融 | 34篇 |
工业经济 | 9篇 |
计划管理 | 49篇 |
经济学 | 99篇 |
运输经济 | 3篇 |
旅游经济 | 7篇 |
贸易经济 | 43篇 |
农业经济 | 13篇 |
经济概况 | 24篇 |
出版年
2023年 | 4篇 |
2021年 | 4篇 |
2020年 | 5篇 |
2019年 | 19篇 |
2018年 | 14篇 |
2017年 | 23篇 |
2016年 | 16篇 |
2015年 | 6篇 |
2014年 | 10篇 |
2013年 | 36篇 |
2012年 | 12篇 |
2011年 | 12篇 |
2010年 | 5篇 |
2009年 | 10篇 |
2008年 | 10篇 |
2007年 | 4篇 |
2006年 | 3篇 |
2005年 | 5篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2002年 | 4篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 4篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 5篇 |
1985年 | 1篇 |
1984年 | 5篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1970年 | 4篇 |
1963年 | 1篇 |
1948年 | 1篇 |
1947年 | 1篇 |
1946年 | 1篇 |
1945年 | 1篇 |
排序方式: 共有281条查询结果,搜索用时 15 毫秒
31.
Seasonal variability is an important source of risk faced by farmers and, regardless of an individual's attitude to risk, there are options to tactically adjust production strategies as the outcomes of risk become known. The objective of this article is to measure the economic benefits of alternative approaches to managing weeds, one of the most serious production problems in Australian cropping systems. A bioeconomic model that combines weed biology, crop growth and economics is developed to value the effects of seasonal variability and the role of tactical responses and sequential decision making in determining an optimal integrated weed management strategy. This shows that there are substantial differences in the measured long‐term benefits from deterministic and stochastic simulations. It is concluded that, for research evaluation of technologies that involve complex biological and dynamic systems, ignoring the impacts of seasonal variability, responses to risk and sequential decision making can lead to an incorrect estimate of the economic benefits of a technology. In this case study of optimal weed management strategies in Australia, the size of the error is high. 相似文献
32.
The real options literature has provided new insights on how to manage irreversible capital investments whose payoffs are
uncertain. Two of the most important predictions from such theory are: (i) greater risk delays a firm’s investment timing,
and (ii) greater risk increases the option value of waiting. This paper challenges such conclusions in a setting in which
the relevant random variable is the arrival time of an unfavorable event. In particular, we model situations in which a firm
must choose the time at which to invest in a project whose profit grows at a known rate until a random date is reached and
decays thereafter, which may be representative of stochastic product or industry life cycles. This is a novel framework in
which a firm can update its beliefs about the profitability of an investment opportunity by simply waiting to invest. Thus,
a wait-and-see approach allows the firm to capitalize on favorable market evolutions and avoid adverse ones to some extent.
Our framework is simple and does not require using stochastic calculus, which allows for an economic interpretation of optimal
investment policies for the cases of one-time and sequential investments. 相似文献
33.
34.
Oscar Choi 《海外经济评论》2008,(18):10-12
2007年4季度以来,由于政府的严厉措施、尤其是货币供应的收紧,大多数城市的住房成交量有所下降。市场对于2008年过度紧缩的忧虑导致了近几个月房地产股的大跌。然而,近期的迹象表明,住房部门受到的约束正在放松。这种情况下,上海市场开始回暖,出现了量价齐升的局面。 相似文献
35.
Abstract . The George scholars today appear to be interesting the academic community in re-evaluating Henry George and his ideas. George, the 19th century American economist and social philosopher, dedicated himself to ending poverty by giving everyone equal access to the earth and its resources. He believed that land monopoly could be ended by taking the economic rent of all land and natural resources to meet the costs of government in lieu of taxes on labor and capital. George's writings revived interest in the ethos of the early settlers a time when sight was being lost of Pioneer America's contribution to the world's march toward freedom. 相似文献
36.
Data gathered on 62 products from 26 biomedical firms founded in Massachusetts between 1968 and 1975 show a positive relationship between the level of technological sophistication of a firm's products and the risk associated with the use of those products. Oscar Hauptman and Edward Roberts report the results of their study of the impact of the U.S. Food and Drug Administration's approval process on these firms' resources and time. They found that young firms dealing with medical devices and pharmaceuticals were more sensitive to this regulatory process than those producing medical auxiliary products. Enactment of the 1976 FDA regulations amendment affecting medical devices apparently created a precarious environment for the marketing of new products. The amendment was found to have significant impact beyond its target product area, medical devices and supplies. It also challenged the management of firms producing drugs and Pharmaceuticals. 相似文献
37.
Oscar Fisch 《Socio》1984,18(4):235-240
This paper represents a theoretical investigation of profit maximizing behavior of a landlord under rent control. The situation envisioned is one that the landlord owns, free and clear, either two housing units ready to merge or one large one ready to convert into two small ones; in each case the units are already in place, such that capital costs are sunk and treated as bygones. Each unit has a technology of production of housing services with a fixed input of quantity of space (shelter) and a variable input of quality, that is affected by physical ageing (non-controllable) and by maintenance (controllable). At starting time t0, we have a state of quality and a historical state of initial quality Q?i, at the time the building was built, with the implicit constraint that Qi(t) < Q?i, for all t> t0. The analysis addresses the general question of housing structural changes—conversion or merger—and how these changes are being accelerated under the threat of rent control. 相似文献
38.
Oscar Fisch 《Regional Science and Urban Economics》1975,5(2):263-277
This paper deals with the conflict between local and through traffic when allocating land for transportation at the expense of residential consumption. The model developed in this paper gives the optimal allocation of land between both uses, via Pontryagin's Maximum Principle, and shows the impact of through traffic on the urban structure, on local transportation costs and on the cost of housing supply. The cost functionals are used to measure the total burden to the inner city and a connection is made to the ongoing discussion of the ‘exploitation’ thesis. 相似文献
39.
Alexander Kerl Oscar Stolper Andreas Walter 《Financial Markets and Portfolio Management》2012,26(2):217-246
In order to fulfill their function as information intermediaries in capital markets, sell-side equity analysts regularly issue
updated forecasts on the stocks they cover. Quite often, the publication of (revised) analysts’ reports is subject to certain
trigger events such as the publication of annual figures or the announcement of an upcoming merger. In this exploratory study,
we develop a two-step procedure to identify the core events that trigger the release of analysts’ reports on companies that
constitute the Dow Jones EuroSTOXX50 index during the three-year period from 2004 to 2006. These can be grouped into Financial Disclosures, Corporate Management, Corporate Strategy, Business Activity, Operating Environment and Share. The results suggest that sell-side analysts attach great importance to non-financial information events when transforming
their earnings estimates into valuation forecasts and stock recommendations. Additionally, we link the information events
identified as reasons of issuance to the summary measures disclosed in the reports in order to investigate the relationship
between the report trigger and associated analyst reaction. Our findings indicate that the forecasting activity of sell-side
analysts is greatly influenced by forward-looking statements made by management, strategy-related news flow, and non-company-specific
information relating to the covered firm’s operating environment. 相似文献
40.
José Luiz Barros Fernandes José Renato Haas Ornelas Oscar Augusto Martínez Cusicanqui 《Journal of Banking & Finance》2012
This paper proposes the use of a portfolio optimization methodology which combines features of equilibrium models and investor’s views as in Black and Litterman (1992), and also deals with estimation risk as in Michaud (1998). In this way, our combined methodology is able to meet the needs of practitioners for stable and diversified portfolio allocations, while it is theoretically grounded on an equilibrium framework. We empirically test the methodology using a comprehensive sample of developed countries fixed income and equity indices, as well as sub-samples stratified by geographical region, time period, asset class and risk level. In general, our proposed combined methodology generates very competitive portfolios when compared to other methodologies, considering three evaluation dimensions: financial efficiency, diversification, and allocation stability. By generating financially efficient, stable, and diversified portfolio allocations, our methodology is suitable for long-term investors such as Central Banks and Sovereign Wealth Funds. 相似文献