Production-location decision and free entry oligopoly: A correction

This paper shows that there is no interior solution in Mai–Hwang's 1992 oligopolistic location model with free entry when the production function exhibits constant or decreasing returns to scale. The comparative static results of the impact of a demand change on the location decision only apply to the case where the production function exhibits increasing returns to scale. It re-examines the impact of a demand change on the location decision of an oligopolistic firm and corrects the propositions derived by [C.C. Mai, H. Hwang, Production-location decision and free entry oligopoly, Journal of Urban Economics 33 (1992) 252–271. Reprinted in: M.L. Greenhut, G. Norman (Eds.), The Economics of Location, vol. I: Location Theory, Edward Elgar, Aldershot, 1995].     

Die Außenwirtschaft der UdSSR in der zeit von perestrojka

The study of divided government is one of important fields in public choice theory. American voters split their ballots as if intent on preserving divided party control. The U.S. House of Representatives has consistently been Democratic for much of the twentieth century. As indicated by Sprague, it is theoretically true that a number of significant consequences for partisan control of a legislature are entailed by the unequal distribution of seat safety under conditions of high levels of institutionalization. The problem is how to measure the institutionalization of partisan seat safety in a time‐series. The model proposed by Sprague is somewhat awkward and complicated in measuring it. This paper provides a more plausible model and tests empirical data.     

A bootstrap test for jumps in financial economics

An i.i.d. bootstrap is applied for the ratio test of Barndorff-Nielsen and Shephard (2006) for jumps in jump diffusion processes. Asymptotic validity is established for the bootstrap test both under the null of no jump and under the alternative of jumps. Finite sample simulation shows that the bootstrap test has more stable size than the ratio test of Barndorff-Nielsen and Shephard (2006).     

美国推进会计准则国际趋同的最新动向及思考

目前世界主要经济体几乎均已采用国际财务报告准则或发布了趋同路线图.我国已草拟了我国企业会计准则(CAS)与国际财务报告准则(IFKS)全面趋同的路线图,将\"实质性趋同\"推进到\"全面趋同\".然而,国际趋同是一个艰难的、互动的过程,我国现阶段国际趋同的成效只能说是刚刚迈出了第一步,随着国际会计准则理事会(IASB)应对金融危机重大项目的完成.我国会计准则可能再次与国际准则产生众多差异.作为积极推动会计准则国际趋同的重要力量,美国积极推行国际趋同所经历的战略转变以及所采取的措施,对我国会计准则国际趋同及其未来发展将具有重要的影响作用.本文拟通过追踪美国采用IFRS的进展和动态情况,阐述美国各界人士对采用IFRS的不同观点,旨在对我国会计准则国际趋同的未来提供借鉴.     

Information Flow and Pricing Errors: A Unified Approach to Estimation and Testing

This study examines whether rates of information flow differbetween trading and nontrading periods, and whether the variancesof pricing errors differ at the open and close of trading. Theapproach improves on existing methods by allowing for correlationbetween pricing errors and information flow, and by conductinginferences at the individual security level. The daytime rateof information flow is about seven times the overnight rate,and the variances of pricing errors at the open are not differentfrom those at the close of trading. This evidence differs fromexisting results based on return variance ratios.     

How Persistent is Stock Return Volatility? An Answer with Markov Regime Switching Stochastic Volatility Models

Abstract:  We propose generalised stochastic volatility models with Markov regime changing state equations (SVMRS) to investigate the important properties of volatility in stock returns, specifically high persistence and smoothness. The model suggests that volatility is far less persistent and smooth than the conventional GARCH or stochastic volatility. Persistent short regimes are more likely to occur when volatility is low, while far less persistence is likely to be observed in high volatility regimes. Comparison with different classes of volatility supports the SVMRS as an appropriate proxy volatility measure. Our results indicate that volatility could be far more difficult to estimate and forecast than is generally believed.