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991.
992.
WHEN IS THE SHORT RATE MARKOVIAN? 总被引:3,自引:0,他引:3
Andrew Carverhill 《Mathematical Finance》1994,4(4):305-312
We answer this question in the very general context of the n-factor Heath, Jarrow, and Morton model for the evolution of the term structure of interest rates, with nonrandom volatility. the answer is that a constraint is imposed on the behavior of the volatility structure. We explain the importance of this result for the design of efficient numerical algorithms for the valuation of options on the term structure. 相似文献
993.
994.
The present paper examines risk, return and the prospects for portfolio diversification among major painting and financial markets over the period 1976–2001. The art markets examined are Contemporary Masters, French Impressionists, Modern European, 19th Century European, Old Masters, Surrealists, 20th Century English and Modern US paintings. The financial markets comprise US Treasury bills, corporate and government bonds and small and large company stocks. In common with the published literature in this area, the present study finds that the returns on paintings are much lower and the risks much higher than conventional investment markets. Moreover, while low correlations of returns suggest that opportunities for portfolio diversification in art works alone and in conjunction with equity markets exist, the construction of Markowitz mean‐variance efficient portfolios indicates that no diversification gains are provided by art in financial asset portfolios. However, diversification benefits in portfolios comprised solely of art works are possible, with Contemporary Masters, 19th Century European, Old Masters and 20th Century English paintings dominating the efficient frontier during the period in question. 相似文献
995.
996.
A definition for a common factor for bivariate time series is suggested by considering the decomposition of the conditional density into the product of the marginals and the copula, with the conditioning variable being a common factor if it does not directly enter the copula. We show the links between this definition and the idea of a common factor as a dominant feature in standard linear representations. An application using a business cycle indicator as the common factor in the relationship between U.S. income and consumption found that both series held the factor in their marginals but not in the copula. 相似文献
997.
Andrew K. Prevost Ramesh P. Rao & Mahmud Hossain 《Journal of Business Finance & Accounting》2002,29(5&6):731-760
This paper looks at board composition determinants in New Zealand. We document that the proportion of outside board members is inversely related to insider equity ownership supporting the notion that these variables are substitute mechanisms in controlling agency problems. We also find that board composition is directly related to debt, ownership concentration, and profitability and inversely related to growth and firm size. There is evidence that firms with influential CEOs have lower outside board representation. Finally, we document that the passage of the legislation reforming company and securities laws in 1993 was associated with increased outside members on the board. 相似文献
998.
Karen Handley Andrew Sturdy Robin Fincham Timothy Clark 《Journal of Management Studies》2006,43(3):641-653
abstract Situated learning theory offers a radical critique of cognitivist theories of learning, emphasizing the relational aspects of learning within communities of practice in contrast to the individualist assumptions of conventional theories. However, although many researchers have embraced the theoretical strength of situated learning theory, conceptual issues remain undeveloped in the literature. Roberts, for example, argues in this issue that the notion of ‘communities of practice’– a core concept in situated learning theory – is itself problematic. To complement her discussion, this paper explores the communities of practice concept from several perspectives. Firstly, we consider the perspective of the individual learner, and examine the processes which constitute ‘situated learning’. Secondly, we consider the broader socio‐cultural context in which communities of practice are embedded. We argue that the cultural richness of this broader context generates a fluidity and heterogeneity within and beyond communities. Finally, we argue that it is sometimes difficult to distinguish conceptually between the terms ‘participation’ and ‘practice’ because of occasional duplication of meaning. We propose, instead, a refinement of the definition to allow for greater conceptual clarity. 相似文献
999.
Andrew K. Rose 《Economics Letters》1984,14(4):369-376
Traditional tests of the role of interest rate news on foreign exchange rates are analysed and found to be of little empirical value. 相似文献
1000.