全文获取类型
收费全文 | 39557篇 |
免费 | 674篇 |
专业分类
财政金融 | 6701篇 |
工业经济 | 2347篇 |
计划管理 | 6574篇 |
经济学 | 9289篇 |
综合类 | 676篇 |
运输经济 | 187篇 |
旅游经济 | 352篇 |
贸易经济 | 8338篇 |
农业经济 | 1160篇 |
经济概况 | 3912篇 |
信息产业经济 | 46篇 |
邮电经济 | 649篇 |
出版年
2023年 | 119篇 |
2021年 | 165篇 |
2020年 | 300篇 |
2019年 | 483篇 |
2018年 | 2726篇 |
2017年 | 2513篇 |
2016年 | 1739篇 |
2015年 | 479篇 |
2014年 | 704篇 |
2013年 | 2627篇 |
2012年 | 1234篇 |
2011年 | 2665篇 |
2010年 | 2487篇 |
2009年 | 2262篇 |
2008年 | 2192篇 |
2007年 | 2419篇 |
2006年 | 697篇 |
2005年 | 911篇 |
2004年 | 902篇 |
2003年 | 1007篇 |
2002年 | 673篇 |
2001年 | 571篇 |
2000年 | 521篇 |
1999年 | 423篇 |
1998年 | 501篇 |
1997年 | 429篇 |
1996年 | 444篇 |
1995年 | 374篇 |
1994年 | 379篇 |
1993年 | 363篇 |
1992年 | 371篇 |
1991年 | 389篇 |
1990年 | 349篇 |
1989年 | 260篇 |
1988年 | 266篇 |
1987年 | 270篇 |
1986年 | 266篇 |
1985年 | 370篇 |
1984年 | 370篇 |
1983年 | 339篇 |
1982年 | 290篇 |
1981年 | 294篇 |
1980年 | 289篇 |
1979年 | 280篇 |
1978年 | 228篇 |
1977年 | 189篇 |
1976年 | 187篇 |
1975年 | 167篇 |
1974年 | 153篇 |
1973年 | 152篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
This paper examines the volume distribution of option trade prices that occurs when the underlying stock price remains constant. The width of these option trade price bands provides direct evidence on the law of one price and the redundancy of options assumed in many option models. We find that index option bands are narrower than equity option bands. Furthermore, for both equity and index options, puts have narrower bandwidths than calls. In general, option price bandwidth is narrow and can be explained by the minimum price movement allowed by the Chicago Board Options Exchanges (CBOE). This supports the single price law and the redundancy assumption. The existence of bid/ask quotes on the option does not materially affect the above results although it does alter the frequency of multiple option trade prices for a given underlying stock price. We note that over 53% of option trading volume occurs without bid/ask quotes on the CBOE compared to less than 15% a decade ago. Our results suggest that the effective bid/ask spread on options is probably no larger than the minimum price movements allowed by the CBOE. Furthermore, the need for the liquidity services of market makers may be declining if the decline in quoting activity stems from cross trading (i.e. trades not involving market makers). 相似文献
872.
This paper examines the effects of policy coordinationin a two-country world with endogenous growth and imperfect capitalmobility. Redistribution is financed by a source-based capital-incometax. Comparing the cases in which countries do and do not coordinatetheir fiscal policies, it is shown that redistribution can beinefficiently high if fiscal policies are not coordinated. Thisis because the negative effects of fiscal policy on home savingsaffect economic growth abroad by inducing a decline in foreigninvestment. This externality can dominate the well-known tax-baseexternality. 相似文献
873.
In the past two decades, litigation in many U.S. stateshas triggered educational reform movements designed to reducethe inequalities in educational expenditures across school districts.This paper uses a panel data set across all the states from 1970–1990to examine the role of litigation and educational finance reformin determining the level of education funding in a flexible,dynamic setting. An important finding of our work is that litigationand reform have differential effects across the states, in somecases leading to increases while in other cases decreases inpredicted spending. 相似文献
874.
Debt in industry equilibrium 总被引:10,自引:0,他引:10
This article shows (1) how entry and exit of firms in a competitiveindustry affect the valuation of securities and optimal capitalstructure, and (2) how, given a trade-off between tax advantagesand agency costs, a firm will optimally adjust its leveragelevel after it is set up. We derive simple pricing expressionsfor corporate debt in which the price elasticity of demand forindustry output plays a crucial role. When a firm optimallyadjusts its leverage over time, we show that total firm valuecomprises the value of discounted cash flows assuming fixedcapital structure, plus a continuum of options for marginalincreases in debt. 相似文献
875.
Pricing mortgage-backed securities in a multifactor interest rate environment: a multivariate density estimation approach 总被引:4,自引:0,他引:4
Multivariate density estimation (MDE) suggests that mortgage-backedsecurity (MBS) prices can be well described as a function ofthe level and slope of the term structure. We analyze how thisfunction varies across MBSs with different coupons. An importantfinding is that the interest rate level proxies for the moneynessof the option, the expected level of prepayments, and the averagelife of the cash flows, while the term structure slope controlsfor the average rate at which these cash flows should be discounted. 相似文献
876.
This article develops and tests a structural model of intradayprice formation that embodies public information shocks andmicrostructure effects. We use the model to analyze intradaypatterns in bid-ask spreads, price volatility, transaction costs,and return and quote auto-correlations, and to construct metricsfor price discovery and effective trading costs. Informationasymmetry and uncertainty over fundamentals decrease over theday, although transaction costs increase. The results help explainthe U-shaped pattern in intraday bid-ask spreads and volatility,and are also consistent with the intra-day decline in the varianceof ask price changes. 相似文献
877.
878.
In this paper we study the pricing and hedging of options whose payoff is a polynomial function of the underlying price at
expiration; so-called ‘power options’. Working in the well-known Black and Scholes (1973) framework we derive closed-form
formulas for the prices of general power calls and puts. Parabola options are studied as a special case. Power options can
be hedged by statically combining ordinary options in such a way that their payoffs form a piecewise linear function which
approximates the power option's payoff. Traditional delta hedging may subsequently be used to reduce any residual risk. 相似文献
879.
In a two-country model with mobile capital we analyse decentralized social insurance policies. These policies are a compromise between the preferences of workers and capital owners. Due to wage bargaining, worker-based social insurance contributions are borne by capital owners. These contributions affect the profitability of investment, and consequently the direction and size of capital flows. Countries will take account of these effects in determining social insurance policy. Noncooperative decision making results in tax competition and an underprovision of social insurance. In addition, increasing economic integration, represented by increasing capital mobility, could imply a divergence of social insurance levels in the two countries. 相似文献
880.
Emile J. Brinkmann Paul M. Horvitz Ying-Lin Huang 《Journal of Financial Services Research》1996,10(1):27-41
Several recent articles have analyzed conditions under which allowing capital-deficient banks to continue to operate may be optimal policy. This article examines the performance of banks admitted into the FDIC's Capital Forbearance Program between 1986 and 1989 and finds that, for the majority of these banks, there was no substantial improvement in their capital ratios. We use a logit regression analysis to attempt to identify those banks whose financial condition improved with forbearance and find that banks which did improve are not clearly identifiable from pre-forbearance financial data. Instead, the banks which improved did so due to infusions of new capital, extraordinary income, and improvements in the local economies, factors which are not easily identifiable ex ante by regulators. The conclusion is that, while some grants of forbearance may result in large saving to the FDIC, in the majority of cases granting forbearance to troubled banks is unlikely to reduce the expected loss to the deposit insurer.University of HoustonUniversity of HoustonCooperative Bank of Taiwan, Taipei, Taiwan 相似文献