… smooth functions that share some shape properties, and so can be approximated as linear
combinations of some M basic shapes Bm, with M being typically smaller than the number of …

In this paper, we introduce an asymptotic test procedure to assess the stability of volatilities
and cross-volatilites of linear and nonlinear multivariate time series models. The test is very …

We propose a multistage testing procedure to determine the order p of a functional
autoregressive process, FAR (p). At its core is the representation of the FAR(p) process as a fully …

Gut and oral microbiota perturbations have been observed in obese adults and adolescents;
less is known about their influence on weight gain in young children. Here we analyzed the …

Objective: Research supports the importance of emotional symptoms in adults with attention-deficit/hyperactivity
disorder (ADHD), which are not reflected in the DSM-5 or ICD-10 criteria…

We present a new methodology for simultaneous variable selection and parameter estimation
in function-on-scalar regression with an ultra-high dimensional predictor vector. We …

Separability is a common simplifying assumption on the covariance structure of spatiotemporal
functional data. We present three tests of separability, one a functional extension of the …

We establish the asymptotic normality of the sample principal components of functional
stochastic processes under nonrestrictive assumptions which admit nonlinear functional time …

Motivated by an empirical analysis of the Childhood Asthma Management Project, CAMP,
we introduce a new screening procedure for varying coefficient models with ultrahigh …

The paper develops inferential methodology for detecting a change in the annual pattern of
an environmental variable measured at fixed locations in a spatial region. Using a framework …