Clay weekly context brief for the Economics category (ISO week 2026-W28).

Clay tracks publications from the Economics feed list. Below are recent items from this category, each with its source and a short description of what the publication covers when one is available in the source feed.

Recent publications:
1. EFX for Additive Chores: Nonexistence, Pareto Incompatibility, and Bi-Valued Existence
   Source: econ.TH (Theoretical Economics)
   Link: https://arxiv.org/abs/2606.08872
   We consider the fair division problem of indivisible chores and resolve the long-standing open problem for the existence of EFX (envy-free up to any item) allocations with additive cost functions.
2. Rational Bubbles at the Spectral Edge: An Operator-Spectral Theory of Fragility, Identification and Finite-Sample Certification
   Source: econ.EM (Econometrics)
   Link: https://arxiv.org/abs/2607.03933
   When markets move more and more in lockstep, are they drifting towards the point where a price bubble becomes possible, and can that drift be measured before the crossing?
3. Sufficientarian Grading Rules and Rankings: Characterizations and Implementation
   Source: econ.TH (Theoretical Economics)
   Link: https://arxiv.org/abs/2607.08293
   Sufficientarian grading rules are defined using a finite family of sufficientarian judgements on individual capability assignments as embodied in a sufficientarian binary grading function (BGF).
4. Bayesian Deep Learning for Discrete Choice
   Source: econ.EM (Econometrics)
   Link: https://arxiv.org/abs/2505.18077
   Discrete choice models (DCMs) are used to analyze individual decision-making in contexts such as transportation choices, political elections, and consumer preferences.
5. Random Utility Model with Endogenously Assigned Menus
   Source: econ.TH (Theoretical Economics)
   Link: https://arxiv.org/abs/2607.08218
   There is a largely overlooked assumption underlying stochastic choice theory: menus are assigned exogenously, as if by a hidden randomized controlled trial.
6. Testing Clustered Equal Predictive Ability with Unknown Clusters
   Source: econ.EM (Econometrics)
   Link: https://arxiv.org/abs/2507.14621
   We develop tests of clustered equal predictive ability (C-EPA) in panels where the clusters are unknown and estimated by the Panel Kmeans algorithm.
7. On the power properties of inference for parameters with interval identified sets
   Source: econ.EM (Econometrics)
   Link: https://arxiv.org/abs/2407.20386
   This paper studies the power properties of confidence intervals (CIs) for a partially-identified parameter of interest with an interval identified set.

Sources in this brief: econ.EM (Econometrics); econ.TH (Theoretical Economics).
Selected 7 of 7 available items for this weekly brief.