Stable mixture GARCH models

A new model class for univariate asset returns is proposed which involves the use of mixtures of stable Paretian distributions, and readily lends itself to use in a multivariate context for portfolio selection. The model nests numerous ones currently in use, and is shown to outperform all its special cases. In particular, an extensive out-of-sample risk forecasting exercise for seven major FX and equity indices confirms the superiority of the general model compared to its special cases and other competitors. Estimation issues related to problems associated with mixture models are discussed, and a new, general, method is proposed to successfully circumvent these. The model is straightforwardly extended to the multivariate setting by using an independent component analysis framework. The tractability of the relevant characteristic function then facilitates portfolio optimization using expected shortfall as the downside risk measure.     

Testing the Bhaduri–Marglin model with OECD panel data

The Bhaduri–Marglin model is a post-Kaleckian model that allows one to study the impact of a functional income distribution on the growth in demand. Over recent years, a number of empirical studies based on this model have aimed at determining whether a redistribution towards profits harms or fosters demand growth. The focus so far has been on a very limited number of countries. This paper is the first to test the Bhaduri–Marglin model with panel data. It finds that demand growth is reduced by a redistribution towards profits in the average OECD country. Productivity growth is also impaired.     

The political economy of agriculture for development today: the “small versus large” scale debate revisited

The role of agriculture in economic development and the development politics of promoting smallholder versus large‐scale agriculture have both been at the center of a long‐lasting and controversial debate. Using an innovative methodology which combines a value chain approach with input‐output‐analysis, the growth multipliers and productivity of both farm types in Guatemala are analyzed. Results show that smallholder agriculture has the same potential to stimulate output growth as large‐scale agriculture. Smallholder value chains include mainly informal sectors and create more jobs than commercial agriculture. Therefore, a reorientation of agricultural and land policies toward small‐scale food producers and within a comprehensive policy of integrated rural development is not only necessary in terms of social equity but also for boosting economic development.     

Entrepreneurial Spawning: Experience,Education, and Exit

We investigate the career dynamics of high‐tech entrepreneurs by analyzing the exit choice of entrepreneurs: to act as a business angel, to found another firm, or to become dependently employed. Our detailed data from CrunchBase indicate that founders are more likely to stick with entrepreneurship as a serial entrepreneur or as an angel investor in cases where the founder had prior experience either in founding other startups or working for a startup, or had a “jack‐of‐all‐trades” education.     

The international oil industry in the 1980s

Few industries have undergone such rapid changes during the last ten years as the international oil industry. During this decade, there have been radical changes in the conditions under which international oil companies acquire and trade crude oil. In addition to the changes in the upstream sector the two quantum jumps in oil prices have drastically altered the conditions of downstream operations. Since 1979 oil demand fell more sharply than total energy demand, thereby reducing its relative importance in the energy economy. These events initiated a far-reaching adjustment process which is likely to continue.     

Der direkte internationale Preiszusammenhang

Ohne Zusammenfassung     

Manipulierte Schadenfälle als Herausforderung für die Praxis

Der Versicherungsbetrug hat insbesondere in den letzten Jahren stark zugenommen. In diesem Artikel werden Abwehrstrategien und Erfolgsfaktoren der Betrugsabwehr eines Versicherungsunternehmens beispielhaft dargestellt. Mit Hilfe der vorgestellten Vorgehensweisen wird sowohl dem Eigenschutz des Versicherungsunternehmens als auch dem Schutz der Versicherungsgemeinschaft Rechnung getragen.