151 citations · 692 across the 40 of their papers we have counts for
19 papers · 1 filter
Generalised Boosted Forests
Indrayudh Ghosal, Giles Hooker
This paper extends recent work on boosting random forests to model non-Gaussian responses. Given an exponential family our goal is to obtain an est…
Generalized Single Index Models and Jensen Effects on Reproduction and Survival
Zi Ye, Giles Hooker, Stephen P. Ellner
Environmental variability often has substantial impacts on natural populations and communities through its effects on the performance of individuals. Because organisms' responses t…
Selecting the Derivative of a Functional Covariate in Scalar-on-Function Regression
Giles Hooker, Hanlin Shang
This paper presents tests to formally choose between regression models using different derivatives of a functional covariate in scalar-on-function regression. We demonstrate that f…
Unrestricted Permutation forces Extrapolation: Variable Importance Requires at least One More Model, or There Is No Free Variable Importance
Giles Hooker, Lucas Mentch, Siyu Zhou
This paper reviews and advocates against the use of permute-and-predict (PaP) methods for interpreting black box functions. Methods such as the variable importance measures propose…
Tree Boosted Varying Coefficient Models
Yichen Zhou, Giles Hooker
This paper investigates the integration of gradient boosted decision trees and varying coefficient models. We introduce the tree boosted varying coefficient framework which justifi…
The Jensen Effect and Functional Single Index Models: Estimating the Ecological Implications of Nonlinear Reaction Norms
Zi Ye, Giles Hooker, Stephen Ellner
This paper develops tools to characterize how species are affected by environmental variability, based on a functional single index model relating a response such as growth rate or…