We propose a class of preconditioners for symmetric linear systems arising from numerical analysis and nonconvex optimization frameworks. Our preconditioners are specifically suited for large indefinite linear systems and may be obtained as by-product of Krylov-subspace solvers, as well as by...

In this paper, we introduce a methodology to be employed for collaborative projects. This methodology, called HORIZON, has been successfully employed in the past for FP6 and FP7 EU projects, but we strongly believe it can be fruitfully employed for H2020 projects as well, guaranteeing quality...

Yield optimization is a challenging topic in electronic circuit design. Methods for Yield optimization based on Montecarlo analysis of a circuit whose behavior is reproduced by simulations usually require too many time expensive simulations to be effective for iterative optimization. In this...

In queste dispense sono raccolte le lezioni del corso di Modelli dinamici per lÕIngegneria Gestionale che si sono tenute nel corso di Laurea Magistrale in Ingegneria Gestionale dell'Universitˆ di Roma, Sapienza, dall'a.a. 2010/2011 fino all'a.a. 2014/2015. Il corso diviso in due parti. Nella...

In many countries, Next Generation Access networks (NGA) deployment and penetration rate proceed at a slower pace than expected. We argue that an ex ante contractual arrangement among access Internet Service Providers (ISPs) and Content Providers (CPs), which builds on the complementarity...

This paper studies how the possibility for firms to sign collusive agreements (as for instance being part of alliances, cartels and mergers) may affect their quality and price choice in a market with vertically differentiated goods. For this purpose we model the firm decisions as a three-stage...

One of the standard predictions of the agency theory is that more incentives can be given to agents with lower risk aversion. In this paper we show that this relationship may be absent or reversed when the technology is endogenous and projects with a higher efficiency are also riskier. Using a...

Mission-driven nonprofit organizations compete for donations through fundraising activities. Such competition can lead to inefficient outcomes, if nonprofits impose externalities on each others' output. This paper studies the sustainability of fundraising coordination agreements, using a...

The goal of trading simply consists in gaining profit by buying/selling a security: the difference between the entry and the exit price in a position determines the profit or loss of that trade. A trading strategy is used to identify proper conditions to trade a security. The role of...

The recent globalization of world economies has led the retail markets of developed countries towards increasing levels of integration and strategic interdependence. A non negligible share of retail and food markets is currently served by co-operative societies. Consistently with this trend, the...