全文获取类型
收费全文 | 12160篇 |
免费 | 334篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 2302篇 |
工业经济 | 958篇 |
计划管理 | 2153篇 |
经济学 | 2719篇 |
综合类 | 236篇 |
运输经济 | 82篇 |
旅游经济 | 179篇 |
贸易经济 | 1942篇 |
农业经济 | 495篇 |
经济概况 | 1398篇 |
信息产业经济 | 1篇 |
邮电经济 | 30篇 |
出版年
2023年 | 76篇 |
2021年 | 82篇 |
2020年 | 158篇 |
2019年 | 205篇 |
2018年 | 268篇 |
2017年 | 289篇 |
2016年 | 275篇 |
2015年 | 188篇 |
2014年 | 268篇 |
2013年 | 1180篇 |
2012年 | 375篇 |
2011年 | 385篇 |
2010年 | 350篇 |
2009年 | 419篇 |
2008年 | 381篇 |
2007年 | 348篇 |
2006年 | 303篇 |
2005年 | 270篇 |
2004年 | 254篇 |
2003年 | 260篇 |
2002年 | 220篇 |
2001年 | 258篇 |
2000年 | 266篇 |
1999年 | 232篇 |
1998年 | 232篇 |
1997年 | 253篇 |
1996年 | 206篇 |
1995年 | 223篇 |
1994年 | 211篇 |
1993年 | 192篇 |
1992年 | 226篇 |
1991年 | 202篇 |
1990年 | 171篇 |
1989年 | 166篇 |
1988年 | 141篇 |
1987年 | 137篇 |
1986年 | 143篇 |
1985年 | 199篇 |
1984年 | 172篇 |
1983年 | 193篇 |
1982年 | 155篇 |
1981年 | 180篇 |
1980年 | 148篇 |
1979年 | 176篇 |
1978年 | 144篇 |
1977年 | 128篇 |
1976年 | 134篇 |
1975年 | 114篇 |
1974年 | 107篇 |
1973年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
A statistically optimal inference about agents' ex ante price expectations within the US broiler market is derived using futures prices of related commodities along with a quasi‐rational forecasting regression equation. The modelling approach, which builds on a Hamilton‐type framework, includes endogenous production and allows expected cash price to be decomposed into anticipated and unanticipated components. We therefore infer the relative importance of various informational sources in expectation formation. Results show that, in addition to the quasi‐rational forecast, the true supply shock, future prices, and ex post commodity price forecast errors have, at times, been influential in broiler producers' price expectations. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
12.
B. Gerritse 《Statistica Neerlandica》1996,50(2):281-294
We introduce a new method for proving large-deviation principles (LDPs). This method amounts to "mixing" a collection of LDPs with a sequence of probability measures that obeys itself an LDP. As an illustration, we construct from empirical measures a sequence of capacity-valued maps that can be considered as an indexed collection of LDPs. The index 1 coincides with Sanov's theorem. By taking a Poisson mixture we establish a new connection with Cramér's theorem. 相似文献
13.
This paper contains a critique of existing legislation which deals with hazardous waste disposal and expands on the efforts
made by the Office of Technology Assessment and other economists to develop a public policy which will deal effectively with
the problems associated with hazardous waste generation and disposal. A new policy is set forth here which encourages both
waste reduction and safe disposal while providing revenue to pay for cleanups at Superfund sites. 相似文献
14.
The price movements of certain assets can be modeled by stochastic processes that combine continuous diffusion with discrete jumps. This paper compares values of options on assets with no jumps, jumps of fixed size, and jumps drawn from a lognormal distribution. It is shown that not only the magnitude but also the direction of the mispricing of the Black-Scholes model relative to jump models can vary with the distribution family of the jump component. This paper also discusses a methodology for the numerical valuation, via a backward induction algorithm, of American options on a jump-diffusion asset whose early exercise may be profitable. These cannot, in general, be accurately priced using analytic models. The procedure has the further advantage of being easily adaptable to nonanalytic, empirical distributions of period returns and to nonstationarity in the underlying diffusion process. 相似文献
15.
16.
Gregory J. Werden Andrew S. Joskow Richard L. Johnson 《Managerial and Decision Economics》1991,12(5):341-352
The literature on industrial organization contains very little direct evidence on the effects of actual mergers. This study estimates the effects of two recent airline mergers approved by the Department of Transportation over the objection of the Department of Justice. The merger of TWA and Ozark appears to have caused a slight increase in fares and a far greater reduction in service on city pairs out of St Louis. The merger of Northwest and Republic appears to have caused a significant increase in fares and a significant reduction in overall service on city pairs out of Minneapolis-St Paul. 相似文献
17.
Andrew Sentance 《Business Strategy Review》1997,8(2):47-49
Andrew Sentance concludes that it will be difficult for the new British Government to limit government borrowing without raising taxes. 相似文献
18.
19.
We apply a discrete choice approach to model the empirical behaviour of the Federal Reserve in changing the federal funds target rate, the benchmark of short‐term market interest rates in the US. Our methods allow the explanatory variables to be nonstationary as well as stationary. This feature is particularly useful in the present application as many economic fundamentals that are monitored by the Fed and are believed to affect decisions to adjust interest rate targets display some nonstationarity over time. The chosen model successfully predicts the majority of the target rate changes during the time period considered (1994–2001) and helps to explain strings of similar intervention decisions by the Fed. Based on the model‐implied optimal interest rate, our findings suggest that there is a lag in the Fed's reaction to economic shocks during this period. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
20.
The idea of judo economics, building on analogies with the sport of judo, has been around for at least 20 years. But taking these ideas further to judo strategy means that a framework of strategic principles can be developed to help companies put stronger opponents on the mat. 相似文献