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Motivated by a famous open question on the single-source unsplittable minimum cost flow problem, we present a new approximation result for the relaxation of the problem where, for a given number k, each commodity must be routed along at most k paths. © 2009 Elsevier B.V. All rights reserved.

“The Price of Robustness” by Bertsimas and Sim [4] represented a breakthrough in the development of a tractable robust counterpart of Linear Programming Problems. However, the central modeling assumption that the deviation band of each uncertain parameter is single may be too limitative in practice: experience indeed suggests that the deviations distribute also internally to the single band, so...

What are the macroeconomic implications of re-allocating taxing rights away from source countries (where goods produced) to market consumed) and introducing minimum rates in international profit taxation? We assess this question a dynamic model that gives meaningful role taxation. find that, low tax economies, average rate will rise. On one hand, reduces price competitiveness firms located thes...

In contrast to the U.S. where universal banking has been legally prohibited, the Second Banking Directive allows European banks both to form financial conglomerates and hold equity stakes in non-financial companies. This paper analyzes the cost and profit efficiency of European financial conglomerates and universal banks. We find that conglomerates are more revenue efficient than their speciali...