On power-boundedness of interval matrices

AbstractIn a recent paper by G. Mayer [8] the convergence of the sequence {[A]k} of the powers of an interval matrix [A] to the nullmatrix was investigated. In this note we give some conditions for the boundedness of the sequence {k−α[A]k}, where α is a nonnegative number. The connection to the α-stability of the set [A] is discussed

Analysis of parametric biological models with non-linear dynamics

In this paper we present recent results on parametric analysis of biological models. The underlying method is based on the algorithms for computing trajectory sets of hybrid systems with polynomial dynamics. The method is then applied to two case studies of biological systems: one is a cardiac cell model for studying the conditions for cardiac abnormalities, and the second is a model of insect nest-site choice.Comment: In Proceedings HSB 2012, arXiv:1208.315

Opting Out, Collective Contracts and Labour Flexibility: Firm-Level Evidence for The Italian Case

This article analyses the role of deviations from higher level collective agreements adopted in firm-level bargaining to regain higher labour mobility, net positive employment effects and a resurgence of labour productivity. Using Italian firm level data, after performing preliminary pooled ordinary least squares and fixed effects estimates, we adopt a difference-in-difference approach combined with a propensity score matching. All the estimations show that opting out clauses notably increases both hiring and separations, but without significant variations in terms of net employment. In addition, no significant labour productivity gains are obtained. The only significant change concerns the increase in the share of temporary workers

Untersuchungen zur Intervallinterpolation

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