Market regulation, labor policies and the wage-productivity gap

This paper proposes an empirical analysis about the influence of some institutional factors (taxation, active and passive labor market policies, labor and goods market regulation and unions’ participation) on the component of the wage growth not explained by the productivity growth (WP gap, thereafter). We consider a 14 OECD countries Panel Data over the period 1983-2003, using four different estimations: fixed effects vector decomposition (FEVD), fixed effects (FE), random effects (RE) and feasible general least square (FGLS). Results for all estimations show that the WP gap is affected by tax wedge, active labor market policies, employment protection for temporary workers and union density, while product market regulation and passive labor market policies do not play a significant role

De Giorgi's approach to hyperbolic Cauchy problems: the case of nonhomogeneous equations

In this paper we discuss an extension of some results obtained by E. Serra and P. Tilli, in [Serra&Tilli '12, Serra&Tilli '16], concerning an original conjecture by E. De Giorgi ([De Giorgi '96, De Giorgi '06]) on a purely minimization approach to the Cauchy problem for the defocusing nonlinear wave equation. Precisely, we show how to extend the techniques developed by Serra and Tilli for homogeneous hyperbolic nonlinear PDEs to the nonhomogeneous case, thus proving that the idea of De Giorgi yields in fact an effective approach to investigate general hyperbolic equations.Comment: 24 page

Do labor market conditions affect the strictness of employment protection legislation?

We provide a theoretical microfoundation for the negative relationship between firing costs and labor market tightness and its effects on labor market performance. The optimal level of firing costs is chosen by the employed worker i.e. the insider by maximizing her human capital. Performing a comparative statics exercise, we analyze the effects of labor market tightness on the optimal choice of firing costs. The results are clear cut and allow to obtain a decreasing firing costs function in the labor market tightness. Moreover, we show that this negative relationship can give rise to a labor market configuration characterized by multiple equilibria: prolonged average duration of unemployment will produce a labor market with low flows and high strictness of employment protection, and vice versa.Matching Models

Nonlinear dynamics on branched structures and networks

Nonlinear dynamics on graphs has rapidly become a topical issue with many physical applications, ranging from nonlinear optics to Bose-Einstein condensation. Whenever in a physical experiment a ramified structure is involved, it can prove useful to approximate such a structure by a metric graph, or network. For the Schroedinger equation it turns out that the sixth power in the nonlinear term of the energy is critical in the sense that below that power the constrained energy is lower bounded irrespectively of the value of the mass (subcritical case). On the other hand, if the nonlinearity power equals six, then the lower boundedness depends on the value of the mass: below a critical mass, the constrained energy is lower bounded, beyond it, it is not. For powers larger than six the constrained energy functional is never lower bounded, so that it is meaningless to speak about ground states (supercritical case). These results are the same as in the case of the nonlinear Schrodinger equation on the real line. In fact, as regards the existence of ground states, the results for systems on graphs differ, in general, from the ones for systems on the line even in the subcritical case: in the latter case, whenever the constrained energy is lower bounded there always exist ground states (the solitons, whose shape is explicitly known), whereas for graphs the existence of a ground state is not guaranteed. For the critical case, our results show a phenomenology much richer than the analogous on the line.Comment: 47 pages, 44 figure. Lecture notes for a course given at the Summer School "MMKT 2016, Methods and Models of Kinetic Theory, Porto Ercole, June 5-11, 2016. To be published in Riv. Mat. Univ. Parm

Spectral partitions for Sturm-Liouville problems

We look for best partitions of the unit interval that minimize certain functionals defined in terms of the eigenvalues of Sturm-Liouville problems. Via \Gamma-convergence theory, we study the asymptotic distribution of the minimizers as the number of intervals of the partition tends to infinity. Then we discuss several examples that fit in our framework, such as the sum of (positive and negative) powers of the eigenvalues and an approximation of the trace of the heat Sturm-Liouville operator

ITSC12d Regole d'Esame e Gruppi 2015-16 (Pubblicati in data 12/05/2016) per Progetti Codesys

In questi file trovate: - i progetti assegnati ai vari gruppi (1=ascensore, 2=lavatrice) - le regole generali d'esame/registrazione e di gestione dei gruppi e dei progetti (da seguire attentamente - aggiornate al 10/05/2016 [solo qualche chiarimento per esame orale rispetto all'aggiornamento del 23/02/2016] ) L'aggiornamento gruppi per i progetti 2015-16 sarà verso aprile-maggio 201

12d Regole d'Esame e Gruppi 2012-13 per Progetti Codesys

In questi file trovate: - i progetti assegnati ai vari gruppi (1=ascensore, 2=lavatrice) - le regole generali di gestione dei gruppi e dei progetti (da seguire attentamente