Federica Ricca

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The political districting problem has been studied since the 60’s and many different models and techniques have been proposed with the aim of preventing districts’ manipulation which may favor some specific political party (gerrymandering). A variety of political districting models and procedures was provided in the Operations Research literature, based on(More)
Automated political districting shares with electronic voting the aim of preventing electoral manipulation and pursuing an impartial electoral mechanism. Political districting can be modelled as multiobjective partitioning of a graph into connected components, where population equality and compactness must hold if a majority voting rule is adopted. This(More)
Researchers in the area of electoral systems have recently turned their attention to network flow techniques with the aim to resolve certain practically relevant problems arising in this area. The aim of the present paper is review some of this work, showing the applicability of these techniques even to problems of a very different nature. Major emphasis(More)
In this paper we discuss how a mathematical approach can be used to solve a serious drawback in the current Italian electoral system for the election of representatives at the Chamber of Deputies and suggest a methodology which is close to the one traditionally adopted in the Italian electoral history, but able to guarantee a more transparent, logical and(More)
This paper deals with the problem of locating path-shaped facilities of unrestricted length on networks. We consider as objective functions measures conceptually related to the variability of the distribution of the distances from the demandpoints to a facility.We study the following problems: locating a path which minimizes the range, that is, the(More)
One of the most active research lines in the area of electoral systems to date deals with the Biproportional Apportionment Problem, which arises in those proportional systems where seats must be allocated to parties within territorial constituencies. A matrix of the vote counts of the parties within the constituencies is given, and one has to convert the(More)