In this paper, I investigate the relationship between preference and
judgment aggregation, using the notion of ranking judgment introduced in List and Pettit. Ranking judgments were introduced in order to state the logical connections between the impossibility theorem of aggregating sets of judgments and Arrow’s theorem. I present a
proof of the theorem concerning ranking judgments as a corollary of Arrow’s theorem,
extending the translation between preferences and judgments defined in List and Pettit
to the conditions on the aggregation procedure.