In this paper, a general overview on spatial and spatiotemporal ARCH models is provided. In particular, we distinguish between three different spatial ARCH-type models. In
In this paper, we propose a two-step lasso estimation approach to estimate the full spatial weights matrix of spatiotemporal autoregressive models. In addition, we allow
This article extends the autoregressive count time series model class by allowing for a model with regimes, that is, some of the parameters in the
Varying coefficient models arise naturally as a flexible extension of a simpler model where the effect of the covariate is constant. In this work, we
Improved communication systems, shrinking battery sizes and the price drop of tracking devices have led to an increasing availability of trajectory tracking data. These data
Currently all major meteorological centres generate ensemble forecasts using their operational ensemble prediction systems; however, it is a general problem that the spread of the
Data taking value on a Riemannian manifold and observed over a complex spatial domain are becoming more frequent in applications, e.g. in environmental sciences and
The R package optimParallel provides a parallel version of the gradient-based optimization methods of optim(). The main function of the package is optimParallel(), which has
In several applied fields, multimodality assessment is a crucial task as a previous exploratory tool or for determining the suitability of certain distributions. The goal
In this paper we aim to propose two models for regression and dependence analysis when dealing with positive spatial or spatio-temporal continuous data. Specifically we
In 2015 the Institute of Physics and Astronomy of the Universidad de Valpara’iso in Chile received as a donation the Bochum 0.61-meter telescope. Here we
The assessment of diversity and similarity is relevant in monitoring the status of ecosystems. The respective indicators are based on the taxonomic composition of biological
In this work we present a spatial approach to model and investigate mortality data referenced over a Lexis structure. We decompose the force of mortality
The Greenland Sea is an important breeding ground for harp and hooded seals. Estimates of the annual seal pup production are critical factors in the
The lack of efficiency in urban diffusion is a debated issue, important for biologists, urban specialists, planners and statisticians, both in developed and new developing
Satellite product validation is key to ensure the delivery of quality products for climate and weather applications. To do this, a fundamental step is the
