In this paper we construct thirteen different types of composite indices by linear combination of indicator variables (with and without outliers/data corruption). Weights of different indicator variables are obtained by maximization of the sum of squared (and, alternatively, absolute)...

Our objective in this paper is to compare the performance of the Differential Evolution (DE) and the Repulsive Particle Swarm (RPS) methods of global optimization. To this end, some relatively difficult test functions have been chosen. These functions are: Perm, Power-Sum, Bukin, Zero-Sum,...

Logarithmic spirals are abundantly observed in nature. Gastropods (such as nautilus, cowie, grove snail, thatcher, etc.) in the mollusca phylum have spiral shells, mostly exhibiting logarithmic spirals vividly. Spider webs show a similar pattern. The low-pressure area over Iceland and the...

In this paper we compare the performance of the Differential Evolution (DE) and the Repulsive Particle Swarm (RPS) methods of global optimization. To this end, seventy test functions have been chosen. Among these test functions, some are new while others are well known in the literature; some are...

The dynamics of multiple time use in paid work and in household activities with housework, child rearing and DIY of married women are analyzed with a two step procedure: the estimation of the participation decision in intertemporal labor force participation strategies (entering, leaving the...

This study on market and non-market labor supply and taxes is based on a theoretical microeconomic model with multiple labor supply in the formal and informal economy. This multiple time allocation model, which explicitly takes into account taxes, transfer payments, socioeconomic characteristics...

In meiner Antrittsvorlesung versuche ich, meine Forschungs- und Lehrvorhaben in drei Themenkomplexen zu umschreiben. Der erste Themenbereich 'Statistik und Freie Berufe', zugleich Denomination meiner Professur, beschreibt nach den Charakteristika Freier Berufe Möglichkeiten und Grenzen der...

The classical canonical correlation analysis is extremely greedy to maximize the squared correlation between two sets of variables. As a result, if one of the variables in the dataset-1 is very highly correlated with another variable in the dataset-2, the canonical correlation will be very high...

Die Freien Berufe und die staatlich gebundenen Freien Berufe agieren in einem wirtschaftsund gesellschaftspolitischen Spannungsfeld, dessen Pole durch Staat und den freien Markt gekennzeichnet werden. Der vorliegende Beitrag thematisiert Privatisierung und Deregulierung für die Freien Berufe...

As simple as it is, results describing the world are heavily dependent on the quality of the underlying data. One of the very crucial variables in microanalytical analyses of well-being and human resources is income. The more, when the situation of the self-employed is regarded. This paper focus...