Piotr Faliszewski, Łukasz Janeczko, Andrzej Kaczmarczyk, Grzegorz Lisowski, Piotr Skowron, Stanisław Szufa
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Strategic Cost Selection in Participatory Budgeting
We study strategic behavior of project proposers in the context of
approval-based participatory budgeting (PB). In our model we assume that the
votes are fixed and known and the proposers want to set as high project prices
as possible, provided that their projects get selected and the prices are not
below the minimum costs of their delivery. We study the existence of pure Nash
equilibria (NE) in such games, focusing on the AV/Cost, Phragm\'en, and Method
of Equal Shares rules. Furthermore, we report an experimental study of
strategic cost selection on real-life PB election data.
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