A spatial mixed Poisson framework for combination of excess-of-loss and proportional reinsurance contracts

In this paper a purely theoretical reinsurance model is presented, where the reinsurance contract is assumed to be simultaneously of an excess-of-loss and of a proportional type. The stochastic structure of the set of pairs (claim’s arrival time, claim’s size) is described by a Spatial Mixed Poisson Process. By using an invariance property of the Spatial Mixed Poisson Processes, we estimate the amount that the ceding company obtains in a fixed time interval in force of the reinsurance contract

Some results on stability concepts for matching models

We consider a general class of two-sided matching markets, called many-to-one matching markets with money. For a special case of these markets, where each seller owns di¤erent objects, we prove that stable outcomes cannot be characterized by the non-existence of unsatis…ed pairs. Moreover, we restore the dual lattice structure in markets with more than one seller using a connection with an assignment game.Matching, Assignment, Stability.

Wave propagation and shock formation in different magnetic structures

Velocity oscillations "measured" simultaneously at the photosphere and the chromosphere -from time series of spectropolarimetric data in the 10830 A region- of different solar magnetic features allow us to study the properties of wave propagation as a function of the magnetic flux of the structure (i.e. two different-sized sunspots, a tiny pore and a facular region). While photospheric oscillations have similar characteristics everywhere, oscillations measured at chromospheric heights show different amplitudes, frequencies and stages of shock development depending on the observed magnetic feature. The analysis of the power and the phase spectra, together with simple theoretical modeling, lead to a series of results concerning wave propagation within the range of heights of this study. We find that, while the atmospheric cut-off frequency and the propagation properties of the different oscillating modes depend on the magnetic feature, in all the cases the power that reaches the high chromosphere above the atmospheric cut-off comes directly from the photosphere by means of linear vertical wave propagation rather than from non-linear interaction of modes.Comment: Accepted for publication in The Astrophysical Journal. 29 pages, 9 figures, 12pt, preprin

JOB MATCHING, TECHNOLOGICAL PROGRESS AND WORKER-PROVIDED ON-THE-JOB TRAINING

According to data from the OCDE, almost one third of the total quantity of on-the-job training is worker-provided. The aim of this paper is to study, in a labor market characterized by frictions, the effects of technological progress on the optimal worker-provided on-the-job training. The paper shows that the greater the technological progress rate less is the probability of the worker investing in specific human capital, if the technology is of creative destruction type, and the greater is the probability of the worker investing specific human capital, if the technology is characterized by renovation; whilst the effect over the general human capital investment doesn't exist in both models. The paper also shows that the impact of human capital investments on labor market outcomes depend on the type of investment - either firm or the market oriented. If the investment is totally aimed at the market, we have as a result an increase in the rate of unemployment, whilst if the investment is totally directed at the firm, we have the opposite effect.

The Impact of Unemployment Insurance Generosity on Match Quality Distribution

This paper investigates the impact of unemployment insurance (UI) generosity on the distribution of match tenure. We show that more generous UI increases expected tenure, reducing the mass of the lower tail of match duration and increasing the duration of matches available. This impact is differentiated across education levels, with the larger benefits accruing to the less educated.