Subsidising Education with Unionised Labour Markets

It is well known from the literature that a unionisation of labour markets leads to an increase in wages and a decrease in employment. However, in these models human capital formation is usually taken as given. This paper internalises the education decision and shows that a unionisation of the labour market for unskilled workers will also lead to an inefficiently low education level. We discuss the effects of an education subsidy. It will turn out that both the way of financing and the reaction of the trade union to tax rate changes are crucial for the employment and welfare effects

Phase distortion mechanisms in linear beam vacuum devices

The mechanism for phase distortion in linear beam vacuum devices is identified in the simplest system that pertains to such devices, the force-free drifting electron beam. We show that the dominant cause of phase distortion in a force-free drifting beam is the inverse dependence of arrival time on velocity for an electron, i.e., the ``$1/u$ nonlinearity,'' and that a secondary cause of phase distortion is the nonlinearity of the velocity modulation. We claim that this is the mechanism for phase distortion in all linear beam vacuum devices, and provide evidence from a traveling wave tube calculation. Finally, we discuss the force-free drifting beam example in the context of the "self-intermodulation" description of phase distortion recently described in Refs. [J. W\"ohlbier and J. Booske, Phys. Rev. E, vol. 69, 2004, 066502], [J. W\"ohlbier and J. Booske, IEEE Trans. Elec. Devices, To appear.]Comment: 11 pages, 6 figures. Submitted to IEEE Trans. Plasma Sc

Explorative Faktorenanalyse eines Fragebogens zur Erfassung von Habituationsveränderungen bei Migränepatienten

Der Arbeit überprüft, in wie weit elektrophysiologische Veränderungen im Habituationsverhalten auch mit einem Fragebogen messbar sind. Ausgehend von einer geschlechterunspezifischen Faktorenstruktur ergab sich nach explorativer Faktorenanalyse mit Itemreduktion eine Einfaktorenlösung mit fünf Items. Zusammenfassend beschreibt der Faktor ein Maß an Störbarkeit durch externe akustische und visuelle Stimuli in Ruhesituationen. Es bestehen keine signifikanten Mittelwertsunterschiede in Abhängigkeit vom Habituationsstatus, jedoch in Abhängigkeit vom Migräneerkrankungsstatus

Darm-Hirn-Kommunikation: Drei Fragen an Ronja Thieleking und Evelyn Medawar

Short interview with Ronja Thieleking and Evelyn Medawar, written by Anne-Kathrin Wöhlbie

[Farbvorschlag zum Anstrich der Thüringischen Landesbibliothek Weimar]

[FARBVORSCHLAG ZUM ANSTRICH DER THÜRINGISCHEN LANDESBIBLIOTHEK WEIMAR] [Farbvorschlag zum Anstrich der Thüringischen Landesbibliothek Weimar] ( -