functional-data-analysis

Locally Sparse Functional Regression

Mauro Bernardi, Antonio Canale and Marco Stefanucci / 2023-10-09

In this post we present a new estimation procedure for functional linear regression useful when the regression surface – or curve – is supposed to be exactly zero within specific regions of its domain. Our approach involves regularization techniques, merging a B-spline representation of the unknown…

bayesian-statistics

Linear-cost unbiased estimator for large crossed random effect models via couplings

Paolo Ceriani and Giacomo Zanella / 2023-09-27

In the following we show how it is possible to obtain parallelizable, unbiased and computationally cheap estimates of Crossed random effects models with a linear cost in the number of datapoints (and paramaters) exploiting couplings. […] CREM model a continuous response variables \(Y\) as…

webinars

Algorithmic Fairness

2023-09-19

Algorithmic Fairness Tuesday, October 3rd, 2023, 7:30 PT / 10:30 ET / 16:30 CET 2nd joint webinar of the IMS New Researchers Group, Young Data Science Researcher Seminar Zürich and the YoungStatS Project. When & Where: […] Speakers: […] Abstract: Multi-calibration is a powerful and…

graphical-models

Illustration of Graphical Gaussian Process models to analyze highly multivariate spatial data

Debangan Dey, Abhirup Datta, Sudipto Banerjee / 2023-07-07

Abundant multivariate spatial data from the natural and environmental sciences demands research on the joint distribution of multiple spatially dependent variables (Wackernagel (2013), Cressie and Wikle (2011), Banerjee and Gelfand (2014)). Here, our goal is to estimate associations over spatial…

random-geometry

The scaling limit of Baxter permutations

Jacopo Borga / 2023-07-02

Versions of the following question can be traced back at least to the work of Henri Poincaré (Poincaré (1912)): In how many ways a simple loop in the plane can cross a line a specified number of times? Despite many efforts, this question remains open after more than a century. Let us start by…

bayesian-nonparametrics

Bayesian nonparametric modeling of conditional multidimensional dependence structures

Rosario Barone and Luciana Dalla Valle / 2023-05-19

In many real data applications we are often required to model jointly \(d\geq 3\) continuous random variables, denoted as \(Y_1,\dots,Y_d\) . The multivariate distribution, which allows us to describe the joint behaviour of those variables, can be denoted as \(F(Y_1,\dots,Y_d)=P(Y_1\le…