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econ.TH2026
Identifiable Preference Types and Optimal Menu-Choice Experiments
Ujjwal Kumar
A planner wants to elicit partial information about a subject's preference relation. Preferences are grouped into ``types" relevant to the planner's purpose. Can the planner identi…
econ.TH2026
Strategy-Proof Probabilistic Social Choice Correspondences under Conditional Expected Utility
Madhuparna Karmokar, Ujjwal Kumar, Soumyarup Sadhukhan
We study unanimous and strategy-proof probabilistic social choice correspondences (PSCCs), where the selected set of alternatives is interpreted as an interim outcome, and agents e…
econ.TH2025
On the existence of EFX allocations for goods
Ujjwal Kumar, Souvik Roy
We consider a set of indivisible goods and a set consisting of agents. The paper shows that if two agents have \textit{arbitrary} set monotonic valuation fun…