全文获取类型
收费全文 | 2566篇 |
免费 | 26篇 |
专业分类
财政金融 | 321篇 |
工业经济 | 197篇 |
计划管理 | 544篇 |
经济学 | 532篇 |
综合类 | 36篇 |
运输经济 | 22篇 |
旅游经济 | 22篇 |
贸易经济 | 423篇 |
农业经济 | 99篇 |
经济概况 | 393篇 |
邮电经济 | 3篇 |
出版年
2024年 | 20篇 |
2023年 | 16篇 |
2022年 | 20篇 |
2021年 | 31篇 |
2020年 | 59篇 |
2019年 | 83篇 |
2018年 | 88篇 |
2017年 | 87篇 |
2016年 | 88篇 |
2015年 | 62篇 |
2014年 | 79篇 |
2013年 | 354篇 |
2012年 | 100篇 |
2011年 | 99篇 |
2010年 | 105篇 |
2009年 | 93篇 |
2008年 | 120篇 |
2007年 | 91篇 |
2006年 | 89篇 |
2005年 | 83篇 |
2004年 | 65篇 |
2003年 | 71篇 |
2002年 | 68篇 |
2001年 | 47篇 |
2000年 | 45篇 |
1999年 | 36篇 |
1998年 | 32篇 |
1997年 | 32篇 |
1996年 | 28篇 |
1995年 | 9篇 |
1994年 | 29篇 |
1993年 | 21篇 |
1992年 | 16篇 |
1991年 | 18篇 |
1990年 | 14篇 |
1989年 | 9篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 11篇 |
1984年 | 17篇 |
1982年 | 15篇 |
1981年 | 12篇 |
1980年 | 8篇 |
1979年 | 16篇 |
1978年 | 10篇 |
1977年 | 15篇 |
1964年 | 7篇 |
1963年 | 8篇 |
1961年 | 9篇 |
1954年 | 7篇 |
排序方式: 共有2592条查询结果,搜索用时 15 毫秒
241.
Francesco Debellis Emanuela Rondi Emmanuella Plakoyiannaki Alfredo De Massis 《Journal of World Business》2021,56(1):101144
Despite the proliferation in research efforts, family firm (FF) internationalization scholarship suffers from fragmentation, theoretical limitations, and empirical indeterminacy, leaving important facets unexplored. This article’s purpose is to unpack how this body of research has evolved over time and interfaces international business (IB) theory. We conduct a systematic literature review of relevant theoretical and empirical studies covering the last 30 years of research and comprising 134 articles. Our study contributes to this corpus of knowledge by identifying and discussing four evolutionary waves of FF internationalization research. We further advance an integrative framework that offers a comprehensive understanding of the state-of-the-art as well as promising avenues for future research at the intersection of IB and FFs. 相似文献
242.
Keith Dickson Helen Lawton Smith Stephen Lloyd Smith 《Technology Analysis & Strategic Management》1991,3(2):143-157
Effective interfirm collaboration is an incresingly significant factor in technological innovation. A wide and complex range of options exists within collabotative arrangements which affect the outcome and rewards for both partners. Firms are often unaware of the strategic implications of collaborative ventures. While some large firms may be invloved in strategic alliances at the corporate level in order to establish or maintain competitiveness, many remain unaware or unconvinced of the potential for the generation of innovations through collaborations with small, flexible, 'hi-tech” firms. the pace of change and the challenge of international competition threatens Western European firms with a 'technology gap' within a 'disorganized capitalist' setting. Various forms of interfirm cooperation within and across natinal boundaires may be important responses to such uncertainty and amy ultimately provide successful strategic remedies to the situation. This article presents the findings of a recently completed research project in which 27 pairs (mostly small/large) of collaborating, innovative firms were studied in order to examine the strategic and operational issues involued in interfirm research cooperation. Whilst highlighting the advantages of collaboration, and the potential problems for both the small and the large partner, we argue that the adoption of 'cooperative game' rules id vital for successful collaborative innovation. Additionally, we attempt to posit our findings within the current debate on organized/disorganized capitalism. 相似文献
243.
244.
John De La Mothe 《Technology Analysis & Strategic Management》1995,7(1):63-77
Science policy is being challenged. Conceptions of innovation and the nature of research are rapidly being forced beyond traditional views which see innovation as a linear process and science policy in terms of funding issues. Indeed, the policy challenge is being defined by the tension between trying to conduct or encourage research that is at or near an expanding research frontier, while simultaneously functioning within 'steady state' fiscal environments. One key manifestation of this challenge—which is underpinned by a new social contract between the scientific and government communities—is being expressed in terms of the changing role that research instrumentation is playing with regard to research management, research policy and research planning. This paper examines several Candian example f the changing nature of research, with particular reference to the role of instrumentation; it also outlines the particular challenges that small open econmies must face with respect to instrument-intensive research and offers a possible taxonomy for analyzing innovation and policy options. 相似文献
245.
Emanuel De Kadt 《World development》1980,8(2):97-105
Concern in developed countries over human rights in the world has mainly focused on the first generation, or ‘civil’ rights, which circumscribe the actions of governments vis-a-vis the citizens. On the other hand, Third-World representatives have placed increasing emphasis on social, economic and cultural rights, which are really aspirations to be progressively achieved. With respect to these, because of scarcity of resources, choices often need to be made over the priority to be given to different aspirations (rights). These choices are similar to those involved in formulating development strategies, and (as with the latter) the concrete meaning given to these rights differs in different places. Much confusion has resulted from this, part of it deliberate and related to the fact that governments are parties to international agreements whose beneficiaries are supposedly the people, who may be repressed or exploited by those same governments. Though there is less ambiguity as regards the core of the ‘civil’ rights than over the ‘social’ rights, there are various reasons to emphasize the indivisibility of all human rights. In spite of the muddle, there is widespread consensus about the desirability of the progressive achievement of a widening range of such rights. 相似文献
246.
Emanuel De Kadt 《World development》1982,10(7):573-584
Current efforts at involving communities in health activities are analysed from a number of perspectives. Participation may be mainly aimed at easing resource constraints, through involvement in the implementation of health activities. Examples are the construction of health infrastructure, or the enlistment of community health workers — though in Latin America strong medical resistance to delegation has severely restricted their tasks. Participation in decision-making has been even more limited, with the exception of some small-scale NGO projects. Examples are next given of the differences that arise between projects with governmental or NGO sponsorship, or with a conservative or progressive orientation. Finally, the structure of the community, and the socio-political context in which it exists, are examined for the different constraints and opportunities they present to community participation for health. 相似文献
247.
Jan G. De Gooijer 《Journal of econometrics》1980,14(3):365-379
Formulae for the numerical computation of the first four exact moments of the sample autocorrelations, given a time series realisation from a general autoregressive moving average process of order (p, d, q) with d=0 or 1, are presented. The exact mean and variance of the sample autocorrelations are computed for various sample sizes and several time series models. The evaluated results are compared with those obtained from approximate formulae for the mean and variance of the sample autocorrelations. A specification of the numerical accuracy of the first two exact moments is included. 相似文献
248.
Greater economic integration in the European Community (EC) will have far-reaching effects for businesses and individuals throughout the UK. Indeed, prior to the commencement of the Single European Market (SEM) — the only certain element of European economic integration — there was much evidence of organisations and industries restructuring, increased inward investment, and mergers and acquisitions. Such activities are likely to have far-reaching implications for local economies. Increasing numbers of local authorities are undertaking studies to assess the implications of the SEM measures for their own areas, and to suggest ways in which local government and other economic development actors might respond to the challenge of the opportunities and threats of the SEM. However, in assessing the impact of the SEM, it is important not to lose sight of the wider process of economic integration which has followed in its wake. This article details the methodology used in a study to assess the impact of the SEM upon the economy of one particular local area: Gloucestershire. The methodology employed would be capable of replication in other local areas. Some of the key findings from the Gloucestershire study are also outlined. Although there is only limited scope for public sector organisations at the local level in helping businesses to respond to the threats and opportunities of the SEM, suggestions for a general role for the County Council, the Training and Enterprise Council, and other organisations were identifiable, and specific recommendations for training policies, promotional activities, and planning policies were forthcoming. 相似文献
249.
The scheduling of food production is often accomplished informally based upon approximate time requirements stated in recipes and the judgment and experience of a food production manager, administrative dietician, or cook. Such schedules are seldom optimized to least overall duration and consequently contain periods of non-productive time on the part of personnel and resources. In addition, these schedules often attempt to avoid resource conflicts through the early scheduled completion of work activity; this leads to many of the menu items being completed sufficiently in advance of serving time that undesirable changes in the nutritional, organoleptic and microbiological properties of the food can take place.In this paper, a branch and bound algorithm is presented as a solution procedure for the foodservice scheduling problem. The advantage of branch and bound in comparison to a heuristic based scheduling procedure is that it can produce schedules which are optimized to least overall duration from start to finish. The added computational cost of the branch and bound procedure is justified, because most foodservice systems cycle their menus. Consequently, each of a finite number of schedules is reused numerous times over an extended period resulting in long-term productivity gains.Another advantage of the algorithm is that right-shifted or late start schedules may be produced. This is in keeping with our objective of minimizing the delay time between the completion of the food and its being served to the consumer.The paper describes a method by which the process time for each of the various steps in a recipe may be computed as a function of the number of servings being prepared. Although these are normally considered to be linear relationships, the algorithm can easily be modified to accept other types of relationships as well.Perhaps the most important aspect of the this research is that the branch and bound algorithm has been implemented to perform branching operations over two classes of decisions. The first class of decisions involves the selection of which recipe steps or activities are to be scheduled at a certain time, and the second class of decisions involves the choice of which resource class to assign to the activities in those cases where alternative resources are allowed. This dual branching philosophy provides a great deal of flexibility to the decision maker for handling the type of scheduling problems commonly found in practice. The expense of this added flexibility, however, is a substantial increase in the size of the decision tree which must be developed and explored.In order to demonstrate the performance of the algorithm for practical purposes, the lunch menus of a short term, acute case, 300 bed hospital in Syracuse, New York were used to develop production schedules. These menus included a total of 89 different hot food items whose recipes were placed into a menu file in the computer along with the coefficients needed to develop process time estimates as a function of numbers of servings to be prepared. In total, fourteen lunch menus are cycled at the hospital; the number of items appearing on the menus ranges from 8 to 14 hot food items.In the first series of tests, resources were assumed not to be interchangeable. The branch and bound procedure was successful in producing optimal solutions for eleven of the fourteen schedules. The three menus which were not optimally solved were aborted, because the size of the solutions tree grew beyond that which could be stored in 500K bytes of common memory. In spite of this, however, the upper bound solutions given by the aborted problems were found to be very close to lower bound values and therefore may be considered as very good solutions.In the second series of tests, certain resources were allowed to be interchangeable for some of the activities. Specifically, we assumed two labor classes. The first of these are called special cooks who are more experienced personnel. Normally special cooks prepare entree items, but they may be called upon in some cases to perform any activity normally performed by the second labor class- the less experienced cooks—who normally prepare soups, sauces and vegetables. The cooks, on the other hand, are never allowed to prepare menu items which call for special cooks. These groundrules are identical to those currently in practice at the hospital from which the test problems were obtained. Ten of the fourteen menus were selected for this series of tests. In all of the ten cases, the algorithm successfully developed optimal solutions without exceeding the 500K byte common memory limitation. And, in spite of the vastly increased tree size resulting from the dual decision branches, the computation times for these tests were only modestly greater than those of the first set of tests where alternative resources were not considered. The success of the algorithm in solving the dual decision problems resulted in large part from its ability to develop strong upper bounds very early in solution process. In addition, the characteristics of food production scheduling problems are such that the lower bound pruning is very effective especially in the early stages of tree development.It is important to note that the use of an algorithm such as this in a practical setting affords a very friendly user interface. Once the foodservice system's menu items have been placed into a file, the user may easily select any set of these items to include in a given schedule. Only three lines of data input are required. The first line specifies the number of items as well as the zero-hour or serving time. The second line identifies the item numbers of the hot-food items to be scheduled. And the third line specifies the number of servings for each of those items which must be prepared. Kitchen personnel with limited experience can be trained to input the data in less than 15 minutes of instruction time. 相似文献
250.
David E. Lindsey Helen T. Farrx Gary P. Gillum Kenneth J. Kopecky Richard D. Porter 《Journal of Monetary Economics》1984,13(1):87-111
This paper examines two issues — the prediction and short-run control of the money stock — associated with the experience following the Federal Reserve's adoption of a non-borrowed reserve-oriented operating procedure in October 1979. Regarding predictability, our analysis suggests that econometric models offer no improvement over the Board's judgmental forecasting procedure in terms of a lower multiplier forecast error. Regarding the question of whether alternative operating targets would have lowered monthly variability in the money stock, our findings suggest that neither a total reserve nor a monetary base operating target would have enhanced the precision of short-run monetary control relative to a non-borrowed reserve operating target. 相似文献