ASYMPTOTIC BEHAVIOR OF DISTRIBUTION DENSITIES IN MODELS WITH STOCHASTIC VOLATILITY. I

We study the asymptotic behavior of distribution densities arising in stock price models with stochastic volatility. The main objects of our interest in the present paper are the density of time averages of a geometric Brownian motion and the density of the stock price process in the Hull–White model. We find explicit formulas for leading terms in asymptotic expansions of these densities and give error estimates. As an application of our results, sharp asymptotic formulas for the price of an Asian option are obtained.     

中国房地产企业的市场营销战略研究

本文简单分析了中国房地产市场的发展过程,指出了当前房地产市场存在的问题以及市场营销对房地产企业的重要性,并对不同的营销手段进行了简单阐述.只有不断加强企业的市场营销,才能在未来市场得到充分发展.     

The effect of real rates of interest on housing prices

During the late 1970s, U.S. house prices were appreciating rapidly even though mortgage interest rates were climbing. Recently, interest rates have eased but prices have moderated. This study examines the role of appreciation expectations in overcoming the negative effects of nominal mortgage interest rates on house prices. Expectations of future appreciation are important determinants of house sales prices, remaining influential during periods of declining and moderating real prices, not just when prices are rising. The real rate of interest, as viewed by the homebuyer, is the mechanism for affecting change in housing price levels. Because the nominal interest rate is slow to reflect changes in expectations, these real rates vary over time. This ebb and flow of real interest rates appears to explain market price levels. Nominal rates play a role as well, primarily in the formation of appreciation expectations.     

Jobs,location, and real estate

The decision to relocate has traditionally been based on job opportunities alone, with no attention paid to the real estate market. The cost of housing, its rate of return, and its specificity to a location do not enter the decision to move or stay. This article develops a more general definition of income, including real estate and labor markets. The null hypothesis is that relocation is based on comparing labor income differentials alone. The alternative is that income is more broadly based, including real estate returns. Estimates are provided in a quantal choice framework.     

加入WTO对我国房地产业的影响及应对策略

房地产业作为我国新一轮经济增长点，加入WTO对其直接或间接的影响是不容忽视的，分析我国加入WTO后对我国房地产业的影响，针对目前我国房地产业中存在的问题提出应对策略。     

Faster Implied Volatilities via the Implicit Function Theorem

We present a faster, more accurate technique for estimating implied volatility using the standard partial derivatives of the Black‐Scholes option‐pricing formula. Beside Newton‐Raphson and slower approximation methods, this technique is the first to provide an error tolerance, which is essential for practical application. All existing noniterative approximation methods do not provide error tolerances and have the potential for large errors.     

Productivity and the Euro-Dollar exchange rate

This article analyses the impact of productivity developments in the United States and the euro area on the euro-dollar exchange rate. The article presents a new measure of relative average labour, productivity (ALP) which does not suffer from the biases implicit in readily available relative ALP data. Importantly, the patterns of these series differ widely. Employing the Johansen cointegration framework, four models are estimated using four different productivity proxies. Our results indicate that the extent to which productivity can explain the euro depreciation varies with the productivity proxy used: readily available measures explain most, our new, preferred measure least. In all models, however, productivity can explain only a fraction of the actual euro depreciation experienced in 1999–2000. JEL no. F31, C32, O47 The views expressed in this study are those of the authors and do not necessarily reflect those of the European Central Bank or its staff.     

Lookback options and diffusion hitting times: A spectral expansion approach

Lookback options have payoffs dependent on the maximum and/or minimum of the underlying price attained during the options lifetime. Based on the relationship between diffusion maximum and minimum and hitting times and the spectral decomposition of diffusion hitting times, this paper gives an analytical characterization of lookback option prices in terms of spectral expansions. In particular, analytical solutions for lookback options under the constant elasticity of variance (CEV) diffusion are obtained.Received: 1 October 2003, Mathematics Subject Classification: 60J35, 60J60, 60G70JEL Classification: G13The author thanks Phelim Boyle for bringing the problem of pricing lookback options under the CEV process to his attention and for useful discussions and Viatcheslav Gorovoi for computational assistance. This research was supported by the U.S. National Science Foundation under grants DMI-0200429 and DMS-0223354.     

The Walk‐down to Beatable Analyst Forecasts: The Role of Equity Issuance and Insider Trading Incentives*

It has been alleged that firms and analysts engage in an "earnings‐guidance game" where analysts first issue optimistic earnings forecasts and then "walk down" their estimates to a level that firms can beat at the official earnings announcement. We examine whether the walk‐down to beatable targets is associated with managerial incentives to sell stock after earnings announcements on the firm's behalf (through new equity issuance) or from their personal accounts (through option exercises and stock sales). Consistent with these hypotheses, we find that the walk‐down to beatable targets is most pronounced when firms or insiders are net sellers of stock after an earnings announcement. These findings provide new insights on the impact of capital‐market incentives on communications between managers and analysts.     

论中国不动产利益分配机制体系的构建

不动产利益分配机制体系是价格、租金、税收和收费的有机组合,由于相关制度的不配套以及改革的“路径依赖”,中国现行的不动产利益分配机制体系仍然存在重大缺陷。在本中我们将首先从理论上阐述不动产利益分配机制的一般关系,然后以家庭承包制为切入点,论述中国农村不动产利益分配机制体系的改革,最后以城市房地产行业为切入点,论述中国城市不动产利益分配机制体系的调整。