The modified conditional sum-of-squares estimator for fractionally integrated models

This paper introduces a modified conditional sum-of-squares (MCSS) estimator for ARFIMA models that corrects the bias caused by estimating a constant term, demonstrating through theoretical analysis and simulations that it significantly outperforms the standard CSS estimator even in small samples, and applying this improvement to reanalyze three classical economic and hydrological datasets.

Mustafa R. Kılınç, Michael MassmannThu, 12 Ma📈 econ

Thin Sets Are Not Equally Thin: Minimax Learning of Submanifold Integrals

This paper establishes a unified theory showing that the minimax optimal estimation rate for functionals identified by "thin sets" (submanifolds of dimension mm in a dd-dimensional space) depends critically on the intrinsic dimensionality, specifically achieving a rate of ns2s+dmn^{-\frac{s}{2s+d-m}} for nonparametric functions with smoothness ss, and provides valid inference procedures via sieve Riesz representation and Sobol points.

Xiaohong Chen, Wayne Yuan GaoMon, 09 Ma📈 econ

Tractable Identification of Strategic Network Formation Models with Unobserved Heterogeneity

This paper proposes a tractable identification approach for strategic network formation models with unobserved heterogeneity by employing a "bounding-by-cc" technique that utilizes monotonicity restrictions on subnetwork configurations to derive identifying restrictions and informative bounds on structural parameters without requiring a closed-form equilibrium solution.

Wayne Yuan Gao, Ming Li, Zhengyan Xu2026-03-10📈 econ

Identification and Counterfactual Analysis in Incomplete Models with Support and Moment Restrictions

This paper establishes a unified framework for counterfactual analysis in incomplete models by proving the isomorphism between identification and counterfactual tasks, extending support-function methods to handle moment closures under minimal conditions, and demonstrating that irreducible models render identified sets and their moment closures statistically indistinguishable.

Lixiong Li2026-03-10📈 econ