Template-type: ReDif-Paper 1.0 Author-Name: Hanssen, Pauline Author-workplace-name: RS: GSBE other - not theme-related research, QE Math. Economics & Game Theory Author-Name: Dietzenbacher, Bas Author-workplace-name: RS: GSBE other - not theme-related research, QE Math. Economics & Game Theory Title: Envy-free reallocations when preferences are single-dipped Abstract: This paper studies reallocation problems where preferences are single-dipped and each agent is endowed with a share of one unit of an infinitely divisible and non-disposable commodity. We focus on several envy-freeness requirements: standard envy-freeness, restricted envy-freeness, net trade envy-freeness, and proportional envy-freeness. It turns out that none of these envy freeness requirements is compatible with Pareto optimality for each reallocation problem. However, for standard envy-freeness, net trade envy-freeness, and proportional envy-freeness, at most one allocation is Pareto optimal. For restricted envy-freeness, at most one allocation is Pareto optimal and individually rational. For each of the four envy-freeness requirements, we characterize this unique allocation for each reallocation problem where it exists. Keywords: resource reallocation, single-dipped preferences, Envy-freeness Classification-JEL: d63,d71 Series: GSBE Research Memoranda Creation-Date: 20260903 Number: 007 File-URL: https://cris.maastrichtuniversity.nl/ws/files/322675802/RM26007.pdf File-Format: application/pdf File-Size: 464942 Handle: Repec:unm:umagsb:2026007 DOI: 10.26481/umagsb.2026007