全文获取类型
收费全文 | 32980篇 |
免费 | 719篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 6388篇 |
工业经济 | 2615篇 |
计划管理 | 5165篇 |
经济学 | 7155篇 |
综合类 | 454篇 |
运输经济 | 276篇 |
旅游经济 | 613篇 |
贸易经济 | 5086篇 |
农业经济 | 1734篇 |
经济概况 | 4154篇 |
信息产业经济 | 1篇 |
邮电经济 | 59篇 |
出版年
2023年 | 162篇 |
2021年 | 207篇 |
2020年 | 392篇 |
2019年 | 615篇 |
2018年 | 714篇 |
2017年 | 735篇 |
2016年 | 738篇 |
2015年 | 455篇 |
2014年 | 774篇 |
2013年 | 3497篇 |
2012年 | 1001篇 |
2011年 | 1117篇 |
2010年 | 953篇 |
2009年 | 1109篇 |
2008年 | 1081篇 |
2007年 | 921篇 |
2006年 | 867篇 |
2005年 | 752篇 |
2004年 | 763篇 |
2003年 | 733篇 |
2002年 | 745篇 |
2001年 | 642篇 |
2000年 | 666篇 |
1999年 | 626篇 |
1998年 | 575篇 |
1997年 | 602篇 |
1996年 | 553篇 |
1995年 | 508篇 |
1994年 | 506篇 |
1993年 | 534篇 |
1992年 | 530篇 |
1991年 | 516篇 |
1990年 | 440篇 |
1989年 | 392篇 |
1988年 | 371篇 |
1987年 | 390篇 |
1986年 | 372篇 |
1985年 | 572篇 |
1984年 | 562篇 |
1983年 | 515篇 |
1982年 | 471篇 |
1981年 | 419篇 |
1980年 | 474篇 |
1979年 | 394篇 |
1978年 | 332篇 |
1977年 | 312篇 |
1976年 | 253篇 |
1975年 | 274篇 |
1974年 | 236篇 |
1973年 | 230篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
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
32.
This study investigates the relative roles of bond ratings and financial information in the setting of bond yields. Structural equation modeling techniques are used to learn whether ratings determine yields or whether both ratings and yields are determined by a concurrent set of economic and financial factors. Tests of alternative structural model configurations provide evidence regarding the associations between bond ratings, financial information, and bond yields. Both ratings and financial information are found to play an important role in determining bond yields. In addition, yields are consistent with the higher rating in cases of split ratings. 相似文献
33.
34.
35.
John E. Keith David L. Barkley 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》1991,3(1):60-77
A study of the location of three classifications of high-tech industries in rural areas was undertaken using ordinary least squares, Tobit, and a two-step estimation procedure suggested by Heckman (1976). The results indicate that the location decision for high tech firms is influenced primarily by the county population, adjacency to an SMSA, and the expenditures on public infrastructure (exclusive of education expenditures). However, location near interstate highways was generally not a significant factor. Results were similar between branch and unit (single ownership) plants. Some differences in signs of orders of magnitude occurred among the estimation procedures. Making a choice between Tobit and Heckman approaches depends upon the goal of the research. 相似文献
36.
This paper analyzes the dynamic relationship between primary and secondary mortgage markets and the short-term and long-term market interest rates. Using a series of monthly data on fixed rate mortgage rates and GNMA rates, we explore the dependence and speed of adjustment in these primary and secondary mortgage rates to each other as well as to the long and short-term government rates. The results indicate that residential mortgage rates in general, appear to follow the long-term rate and are not very sensitive to movements in the short-term interest rate. 相似文献
37.
38.
Using Turkish industry-level data from 1983 to 1990, we find that politically organized industries receive both higher protection and promotion than unorganized ones. Tariff rates are decreasing (increasing) in the import-penetration ratio and the absolute value of the import-demandelasticity for organized (unorganized) industries. Subsidy rates are decreasing (increasing) in the output-supply elasticity for organized (unorganized) industries. The results are consistent with the predictions of the Grossman–Helpman model and its extension in this paper. The mix of protection and promotion is inversely related to the ratio of their respective marginal deadweight cost measures. 相似文献
39.
The Singapore Exchange (SGX), a small satellite market, successfully competes with a large home market, the Osaka Securities Exchange (OSE), in trading the Nikkei 225 futures index. In this paper, we investigate the contribution of the SGX to price discovery and shed light on the reasons for its continued success. Evidence is provided from information revelation and price discovery of three competing but informationally linked markets of the Nikkei 225 index—domestic spot (Tokyo Stock Exchange), domestic futures (OSE), and foreign futures (SGX), which represents the satellite market. Overall, the futures market contributes 77% to price discovery, with the satellite market contributing 42% of the futures and 33% of the total price discovery. These figures, surprisingly, far exceed the satellite market's share of trading volume. Support is provided for the extended trading hours on the SGX for three of the four non‐overlapping trading sub‐periods. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:981–1004, 2004 相似文献
40.
Here we consider the hedging roles of a price futures contract versus a revenue futures contract. In the absence of idiosyncratic output risk, the revenue contract almost always dominates the price contract. Idiosyncratic output risk provides conditions under which the price contract should dominate. When production risk is largely idiosyncratic, a producer with an anticipated long actuals position might combine a long revenue futures position with a short price futures position. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:503–512, 2004 相似文献