首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   12494篇
  免费   212篇
财政金融   2327篇
工业经济   1018篇
计划管理   1899篇
经济学   2732篇
综合类   175篇
运输经济   73篇
旅游经济   147篇
贸易经济   1831篇
农业经济   702篇
经济概况   1787篇
信息产业经济   2篇
邮电经济   13篇
  2020年   110篇
  2019年   151篇
  2018年   194篇
  2017年   190篇
  2016年   177篇
  2015年   128篇
  2014年   176篇
  2013年   1153篇
  2012年   268篇
  2011年   307篇
  2010年   289篇
  2009年   338篇
  2008年   316篇
  2007年   257篇
  2006年   247篇
  2005年   278篇
  2004年   226篇
  2003年   262篇
  2002年   206篇
  2001年   250篇
  2000年   234篇
  1999年   232篇
  1998年   225篇
  1997年   235篇
  1996年   259篇
  1995年   230篇
  1994年   226篇
  1993年   191篇
  1992年   216篇
  1991年   231篇
  1990年   202篇
  1989年   163篇
  1988年   165篇
  1987年   135篇
  1986年   189篇
  1985年   256篇
  1984年   254篇
  1983年   250篇
  1982年   220篇
  1981年   230篇
  1980年   197篇
  1979年   213篇
  1978年   185篇
  1977年   161篇
  1976年   137篇
  1975年   134篇
  1974年   131篇
  1973年   102篇
  1972年   103篇
  1971年   92篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
This paper is essentially a summary of the book Measuring the Nation's Wealth (Volume 29, Studies in Income and Wealth, New York: National Bureau of Economic Research, 1964), which is the report of study directed by the author. The purpose o f the study was to assess the problems and possibilities of conducting a national census of real wealth as a basis for continuing wealth and balance sheet estimates for the U.S. economy, by major sector.
It is stressed that the balance sheets and wealth estimates should be designed as a consistent part of an integrated system of national income accounts. Thus, valuation (at market prices and/or depreciated replacement costs), sectoring, and type-of-asset detail in the basic data and derived estimates should be compatible with the flow estimates contained in the economic accounts. Consistency of stock and flow estimates facilitates analysis of inter-relationships, and is helpful in the estimation process.
It is recommended that in the U.S. asset data by broad categories be collected as part of the recurring economic censuses and other reporting systems, but that detail on fixed reproducible assets (construction and equipment) at cost, by year or period of acquisition, be obtained from a small sample of respondents in each industry. The detail would be useful in its own right, and also permit revaluation of the assets by use of price indexes and depreciation rates to a current depreciated replacement cost basis. Where feasible, respondent estimates of market values would also be obtained.
The proposal is thus a compromise between the Japanese 1955 sample survey of assets, and the detailed wealth inventory of the U.S.S.R. which was begun in 1959. Preliminary work is now underway in the U.S. federal statistical agencies to expand collection of asset data, and to prepare comprehensive wealth estimates in the framework of the national income accounts.  相似文献   
122.
Ohne Zusammenfassung  相似文献   
123.
124.
Fresh Juice Incorporated (FJI) is in the process of determining whether it should launch a new fruit juice, Genetically Enhanced (GE) Juice. The GE Juice meets consumers' demands for a tasty, nutritious product and it would be the first new juice product in the last fifteen years. Before FJI decides to launch GE Juice, it must analyze the uncertainty surrounding market size, market share, and price of GE Juice. Finally, if FJI decides to launch GE Juice, then they must decide if they will bottle the juice themselves or outsource this process. This case teaches students how to discuss the strategic implications of launching a new product and develop a net present value and financial feasibility simulation model given limited information.  相似文献   
125.
126.
127.
128.
129.
Stephens TW 《Food Policy》1986,11(3):193-196
The large amount of food aid that was required to meet Africa's emergency food situation resulted in the postponement of some fundamental decisions that were being taken about food aid use in sub-Saharan Africa. Now the donor community and recipient governments are again giving priority to integrating food aid with other available resources in order to meet longer-term food policy and wider development objectives. This paper looks at some of the policy and management issues which need to be addressed if the effectiveness of food aid assistance is to be improved in the current African context. Shortages of locally qualified personnel to administer project food aid have proven to be a major bottleneck in most sub-Saharan countries. Most sub-Saharan states receive food aid from a variety of sources: multilateral, bilateral and a few private-voluntary organizations. As a result, countervailing priorities are set by the donors themselves and give rise to conflicts. The recent drought and famine conditions have compounded an image problem in which food aid is narrowly identified by recipient governments as a project resource to be used primarily for nutrition interventions and for the rural sector. The image problem often limits project selection and overlooks innovative uses of food aid. Many sub-Saharan countries are starting to acquire considerable amounts of counterpart funds from program food aid. However, their use is not coherently integrated with the total aid flow. Multi-year programming has emerged as a management issue which has unnecessarily divided the food aid donor community. The fundamental issue is flexibility in programming, not multi-year programming. The major policy objective now facing the food aid donor community and recipient countries is how to lower emergency allocations while simultaneously increasing project and program aid. Most nonfood-aid donor agencies and their constituent bodies do not treat food aid as a valid economic resource, thereby undermining its effectiveness. The eventual success of food aid use in Africa may be a function of the recipient governments and other major donor and financial organizations.  相似文献   
130.
Using Annual Housing Survey data on multifamily structure occupancy by household type for 1975, together with number of household projections from the Department of Agriculture, a gross level of multifamily housing demand is projected. Allowance is made for a 2 percent replacement rate of the total stock as well as a 5 percent vacancy figure for new household demand. Assuming that: (1) there is no massive shift away from one-family ownership to multifamily units, and (2) the present level of conversions from one-family units to multiple occupancy continues to offset the trend of conversion from rental multifamily units to condominium status, then total future demand for multifamily rental units is well within current construction levels.
  • We are presently building one and one-half times the demand of 416,000 units per year projected for 1975–80.

  • The demand from 1980 to 1990 decreases to 367,000 new units annually.

  • This is further reduced to 335,000 units annually for the period 1990–2000.


The major determinants of future demand will focus on the scrap-page rate of extant facilities and the regional shifts of population.
The future supply of multifamily structures depends on an abatement of construction costs and interest rates, and/or massive levels of Government subsidy.
There is evidence that operating cost rises are challenging the financial integrity of multifamily structures. This is manifested by the HUD and private market mortgage delinquency and foreclosure rates.
Policy focus for the future should emphasize the minimization of both construction and operating costs rather than augmented delivery rates.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号