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The literature of comparative judicial studies maintains that in Argentina judges of the courts change frequently, and that they are induced to retire through informal strategies and pressures. This paper argues that the political changes of court judges are explained by mechanisms of negotiation and co-optation, which are behind the informal strategies used by governors. The main assumption is that judges leave their posts when they do not have the political backing of leaders or party factions that can sustain them in office, beyond the pressure of the governor in office to remove them. To test the argument, a truth table is made up of ten Argentine provinces.