2 citations · 3 across the 6 of their papers we have counts for
4 papers · 1 filter
A Sphericity Filter for Space-Filling Designs in Nondeterministic Experiments
Andrew T. Karl
Space-filling designs support flexible modeling in noisy multi-response experiments, but an individual design can give poor precision for low-order effects. We use a low-order work…
Factoring A-Optimality into D-Optimality and Sphericity
Andrew T. Karl, Bradley Jones
The D criterion measures the volume of the joint confidence ellipsoid for the linear model coefficients and ignores its shape, so designs with the same D value can estimate individ…
Parameter-Specific Bias Diagnostics in Random-Effects Panel Data Models
Andrew T. Karl
The Hausman specification test assesses the random-effects specification by comparing random-effects and fixed-effects estimators. This note shows how a coefficient-specific diagno…
A Randomized Permutation Whole-Model Test Heuristic for Self-Validated Ensemble Models (SVEM)
Andrew T. Karl
We introduce a heuristic to test the significance of fit of Self-Validated Ensemble Models (SVEM) against the null hypothesis of a constant response. A SVEM model averages predicti…