Standard measures of consumer price inflation are based on a bundle of representative goods. It is well known that this approach might overstate inflation for new products and products with fast increasing quality. For this reason, hedonic adjustment methods have been proposed and introduced in...

In econometric modelling the choice of relevant variables is of crucial importance for the Interpretation of the results. In many cases it is based on some a priori knowledge from economic theory and a rather heuristic procedure for determining other influential variables sometimes based on an...

Over the last decade credit rationing has been regarded increasingly as the outcome of asymmetric Information. Profit maximization of the banks might lead to interest rates lower than the market equilibrium rate. Administering loans at a higher interest rate to the rationed customers will...

A combinatorical problem is said to be of high computational complexity, if it can be shown that every efficient algorithm needs a high amount of resources as measured in Computing time or storage capacity. This paper will (1) introduce some basic concepts of mathematical complexity theory; (2)...

Not all markets are always characterized by immediate market clearing, for example due to a delayed adjustment of quantities and prices. Macroeconometric disequilbrium models proved to be a valuable tool in assessing the relevance of such phenomena on goods and labour markets. Asymmetric...

Asymmetric information between lender and borrower is made responsible for financing constraints at the firm level which may influence real activity. In this paper a standard model of credit rationing due to adverse selection and adverse incentive effects is used to derive hypotheses on causes...

In dieser Arbeit wird die Entwicklung der intersektoralen Lohnstruktur in der BRD untersucht. Als Ziel weiterer Arbeiten steht dabei auch die Erklärung des Mismatchparameters für den Arbeitsmarkt in Mengenrationierungsmodellen im Hintergrund. Hier wird zunächst axiomatisch ein Dispersionsmaß...

Mengenrationierungsmodelle erwiesen sich in den vergangenen Jahren als geeignete Instrumente, um Entwicklungen auf Güter- und Arbeitsmärkten zu beschreiben. Wesentliches Ingrediens dieser Modelle ist die Abkehr von der Annahme ständig preisgeräumter Märkte. Als Ursache für die Rationierung...

Threshold Accepting (TA) is a powerful optimization heuristic from the class of stochastic local search algorithms. It has been applied successfully to different optimization problems in statistics and econometrics, including the uniform design problem. Using the latter application as example,...

In der aktuellen Auseinandersetzung um ein "Bündnis für Arbeit", die aus dem vielbeachteten Vorschlag des Vorsitzenden der Gewerkschaft IG-Metall Zwickel resultierte, werden eine Reihe von Modellen diskutiert, die letztlich zu mehr Beschäftigung führen sollen. Einem Aspekt der Diskussion...