Incorporating decision makers’ risk preferences into real options modelsIsik, Murat
doi: 10.1080/13504850500192523pmid: N/A
This study develops a framework to link the expected utility analysis to real options models in order to capture the joint effects of risk aversion and irreversibility. It aims at modifying the theory of investment under uncertainty by incorporating decision makers’ risk preferences and allows explicitly analysing the impacts of risk aversion, uncertainty and irreversibility on decisions such as investment and resource allocations. It addresses the shortcomings of the commonly used expected utility and investment under uncertainty models by generalizing the theory of irreversible investment to allow for risk-averse investors. It was found that uncertainty, irreversibility and risk aversion are important determinants of the optimal timing of irreversible decisions. Ignoring risk preferences in real options models would lead to overestimation or underestimation of the magnitude of investments.
Unstable periodic orbits embedded in a chaotic economic dynamics modelIshiyama, Ken-ichi; Saiki, Yoshitaka
doi: 10.1080/13504850500120318pmid: N/A
We numerically find unstable periodic solutions embedded in a chaotic attractor in a generalized Goodwin model with an interaction between two countries and focus on a class of simple periodic orbits extracted from them. We confirm that chaotic behaviour represented by the model is qualitatively and quantitatively related to the unstable periodic solutions. The viewpoint in this article is based on recent work in physics. The result implies significance and usefulness of unstable periodic solutions embedded in chaotic economic dynamics.
International income polarization: a noteDuro, Juan
Antonio
doi: 10.1080/13504850500184298pmid: N/A
International income polarization is mainly analysed through the use of EGR (Esteban et al., 1999). The main empirical results can be summarized as follows: first, polarization followed a curvilinear trajectory over time, with a slight increase up until the mid-1970s followed by a significant decrease; secondly, the evidence indicates that distributive inequality followed a similar pattern; and finally, the data suggest that the best simplified description of international income distribution, based on this approach, would be one structured around three income groups.
Is there convergence in income inequality levels among the European regions?Ezcurra, Roberto; Pascual, Pedro
doi: 10.1080/13504850500245669pmid: N/A
The regional distribution of income inequality in the European Union between 1993 and 1998 is examined. The results obtained reveal the existence of a process of convergence in regional inequality levels over the period analysed. This was due basically to the reduction in income dispersion that took place in regions registering relatively high levels of inequality in 1993. Polarization in the distribution under study is also found to decrease, irrespective of the number of groups considered. Nevertheless, since the observed level of intradistributional mobility is low, the European regions tend, over time, to maintain their relative positions in terms of inequality. Finally, the analysis carried out highlights the relevance of the national component in explaining the dynamics of regional inequality distribution.