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81.
In an incomplete market, we study the optimal consumption-portfolio decision of an investor with recursive preferences of Epstein?CZin type. Applying a classical dynamic programming approach, we formulate the associated Hamilton?CJacobi?CBellman equation and provide a suitable verification theorem. The proof of this verification theorem is complicated by the fact that the Epstein?CZin aggregator is non-Lipschitz, so standard verification results (e.g. in Duffie and Epstein, Econometrica 60, 393?C394, 1992) are not applicable. We provide new explicit solutions to the Bellman equation with Epstein?CZin preferences in an incomplete market for non-unit elasticity of intertemporal substitution (EIS) and apply our verification result to prove that they solve the consumption-investment problem. We also compare our exact solutions to the Campbell?CShiller approximation and assess its accuracy. 相似文献
82.
This paper examines the reach and impact of the South African Child Support Grant, using longitudinal data collected through the Africa Centre for Health and Population Studies. The grant is being taken up for a third of all age-eligible resident children, and appears to be reaching those children living in the poorer households of the demographic surveillance area (DSA). Children who received the grant are significantly more likely to be enrolled in school in the years following grant receipt than are equally poor children of the same age. However, older brothers and sisters of grant recipients, when they were observed at younger ages, were less likely than other children to be enrolled in school – perhaps reflecting the greater poverty in grant-receiving households. Thus the grant appears to help overcome the impact of poverty on school enrolment. 相似文献
83.
This paper explores changes in work organisation in the distribution operations of large Australian retailers. While popularised by consultants as a 'lean logistics' approach, the research findings suggest increasing variation in both the technical and social organisation of work. Differences in work organisation reflect variations in management choice, as well as the negotiated nature of workplace change. 相似文献
84.
85.
In this paper, we consider the asset allocation problem of an investor allocating his funds between several corporate bonds and a money market account. In particular, we provide a realistic model of financial distress: firstly, we model Chapter 7 and Chapter 11 bankruptcies as different possible outcomes of financial distress. Secondly, we take into consideration that, in practice, “default” is not the end, but the beginning of financial distress, eventually leading to a reorganization or a liquidation of a distressed firm. Thirdly and most importantly, we are able to analyze the impact of contagion on an investor’s demand for corporate bonds. Contagion is an important phenomenon, as it reduces the investor’s ability to diversify his portfolio, and we show that the bond demand can change by more than 50%. 相似文献
86.
A key debate in the corporate social responsibility (CSR) literature is the tension between global pressures and local responses. Developing country suppliers often grumble that CSR compliance adds costs. Yet, local collective action, articulated through industry associations, can potentially reduce costs and promote local embeddedness of CSR initiatives. Through case study analysis, this paper considers how demands for CSR compliance prompted collective action responses in selected developing country export industries. We argue that differences in collective responses can be partially explained by how local export industries are inserted into global value chains. We distinguish between ‘highly visible’ value chains, led by internationally well known brands as lead firms, and relatively ‘less visible’ chains, where external CSR pressures come from a variety of sources, including less dominant lead firms, international/national regulatory frameworks and national media. This differentiation suggests a possible trade‐off between the independence and the embeddedness of collective CSR initiatives. Copyright © 2010 John Wiley & Sons, Ltd and ERP Environment. 相似文献
87.
Moshe Ben-Akiva André de Palma Daniel McFadden Maya Abou-Zeid Pierre-André Chiappori Matthieu de Lapparent Steven N. Durlauf Mogens Fosgerau Daisuke Fukuda Stephane Hess Charles Manski Ariel Pakes Nathalie Picard Joan Walker 《Marketing Letters》2012,23(2):439-456
We develop a general framework that extends choice models by including an explicit representation of the process and context of decision making. Process refers to the steps involved in decision making. Context refers to factors affecting the process, focusing in this paper on social networks. The extended choice framework includes more behavioral richness through the explicit representation of the planning process preceding an action and its dynamics and the effects of context (family, friends, and market) on the process leading to a choice, as well as the inclusion of new types of subjective data in choice models. We discuss the key issues involved in applying the extended framework, focusing on richer data requirements, theories, and models, and present three partial demonstrations of the proposed framework. Future research challenges include the development of more comprehensive empirical tests of the extended modeling framework. 相似文献
88.
89.
Mogens Steffensen 《Journal of Economic Dynamics and Control》2011,35(5):659-667
We consider the continuous time consumption-investment problem originally formalized and solved by Merton in case of constant relative risk aversion. We present a complete solution for the case where relative risk aversion with respect to consumption varies with time, having in mind an investor with age-dependent risk aversion. This provides a new motivation for life-cycle investment rules. We study the optimal consumption and investment rules, in particular in the case where the relative risk aversion with respect to consumption is increasing with age. 相似文献
90.
Does economic freedom cause economic growth or does causality run in the reverse direction? And do all the constituent parts of economic freedom exert a causal impact on economic growth or do some freedoms matter more than others? In order to answer these questions, this paper conducts a series of Granger causality tests using panel data for the period 1970–1999. In addition, the paper discusses a number of model specification issues, e.g. lag-length selection and the importance of intervening variables. The results suggest that some (but not all) aspects economic freedom affect economic growth and investment. On the other hand, there is only weak evidence that growth affects economic freedom. 相似文献