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math.ST2026
Identification and consistent estimation in source apportionment using geometry
Bora Jin, Abhirup Datta
Source apportionment, the attribution of observed multipollutant concentrations to underlying sources, can be cast as a non-negative matrix factorization (NMF) problem. Because NMF…
math.ST2026
Consistent Infill Estimability of the Regression Slope Between Gaussian Random Fields Under Spatial Confounding
Abhirup Datta, Michael L. Stein
The problem of estimating the slope parameter in regression between two spatial processes under confounding by an unmeasured spatial process has received widespread attention in th…