Search Results for author: Marco Scutari

Found 23 papers, 2 papers with code

Towards a Transportable Causal Network Model Based on Observational Healthcare Data

no code implementations13 Nov 2023 Alice Bernasconi, Alessio Zanga, Peter J. F. Lucas, Marco Scutari, Fabio Stella

Over the last decades, many prognostic models based on artificial intelligence techniques have been used to provide detailed predictions in healthcare.

Causal Discovery Decision Making +1

Analyzing Complex Systems with Cascades Using Continuous-Time Bayesian Networks

no code implementations21 Aug 2023 Alessandro Bregoli, Karin Rathsman, Marco Scutari, Fabio Stella, Søren Wengel Mogensen

Interacting systems of events may exhibit cascading behavior where events tend to be temporally clustered.

Learning Bayesian Networks with Heterogeneous Agronomic Data Sets via Mixed-Effect Models and Hierarchical Clustering

no code implementations11 Aug 2023 Lorenzo Valleggi, Marco Scutari, Federico Mattia Stefanini

Rooted in the linear mixed-effects models framework and tailored for hierarchical data, this novel approach demonstrates enhanced BN learning.

Causal Inference Management

The Impact of Missing Data on Causal Discovery: A Multicentric Clinical Study

no code implementations17 May 2023 Alessio Zanga, Alice Bernasconi, Peter J. F. Lucas, Hanny Pijnenborg, Casper Reijnen, Marco Scutari, Fabio Stella

Causal inference for testing clinical hypotheses from observational data presents many difficulties because the underlying data-generating model and the associated causal graph are not usually available.

Causal Discovery Causal Inference +1

fairml: A Statistician's Take on Fair Machine Learning Modelling

no code implementations3 May 2023 Marco Scutari

The adoption of machine learning in applications where it is crucial to ensure fairness and accountability has led to a large number of model proposals in the literature, largely formulated as optimisation problems with constraints reducing or eliminating the effect of sensitive attributes on the response.

Fairness Model Selection +1

Using Mixed-Effects Models to Learn Bayesian Networks from Related Data Sets

no code implementations8 Jun 2022 Marco Scutari, Christopher Marquis, Laura Azzimonti

We commonly assume that data are a homogeneous set of observations when learning the structure of Bayesian networks.

Comments on: "Hybrid Semiparametric Bayesian Networks"

no code implementations12 May 2022 Marco Scutari

Invited discussion on the paper "Hybrid Semiparametric Bayesian Networks" by David Atienza, Pedro Larranaga and Concha Bielza (TEST, 2022).

Achieving Fairness with a Simple Ridge Penalty

no code implementations18 May 2021 Marco Scutari, Francesca Panero, Manuel Proissl

In this paper we present a general framework for estimating regression models subject to a user-defined level of fairness.

Fairness Model Selection +1

Hard and Soft EM in Bayesian Network Learning from Incomplete Data

1 code implementation9 Dec 2020 Andrea Ruggieri, Francesco Stranieri, Fabio Stella, Marco Scutari

Incomplete data are a common feature in many domains, from clinical trials to industrial applications.

Imputation

A Bayesian Hierarchical Score for Structure Learning from Related Data Sets

no code implementations4 Aug 2020 Laura Azzimonti, Giorgio Corani, Marco Scutari

In this paper we propose a new Bayesian Dirichlet score, which we call Bayesian Hierarchical Dirichlet (BHD).

A Constraint-Based Algorithm for the Structural Learning of Continuous-Time Bayesian Networks

no code implementations7 Jul 2020 Alessandro Bregoli, Marco Scutari, Fabio Stella

Dynamic Bayesian networks have been well explored in the literature as discrete-time models: however, their continuous-time extensions have seen comparatively little attention.

Learning Bayesian Networks from Incomplete Data with the Node-Average Likelihood

no code implementations29 Apr 2020 Tjebbe Bodewes, Marco Scutari

Bayesian network (BN) structure learning from complete data has been extensively studied in the literature.

Bayesian Network Models for Incomplete and Dynamic Data

no code implementations15 Jun 2019 Marco Scutari

Bayesian networks are a versatile and powerful tool to model complex phenomena and the interplay of their components in a probabilistically principled way.

Who Learns Better Bayesian Network Structures: Accuracy and Speed of Structure Learning Algorithms

no code implementations30 May 2018 Marco Scutari, Catharina Elisabeth Graafland, José Manuel Gutiérrez

Three classes of algorithms to learn the structure of Bayesian networks from data are common in the literature: constraint-based algorithms, which use conditional independence tests to learn the dependence structure of the data; score-based algorithms, which use goodness-of-fit scores as objective functions to maximise; and hybrid algorithms that combine both approaches.

Dirichlet Bayesian Network Scores and the Maximum Relative Entropy Principle

no code implementations2 Aug 2017 Marco Scutari

We will use this connection to show that BDeu should not be used for structure learning from sparse data, since it violates the maximum relative entropy principle; and that it is also problematic from a more classic Bayesian model selection perspective, because it produces Bayes factors that are sensitive to the value of its only hyperparameter.

Bayesian Inference Model Selection

Beyond Uniform Priors in Bayesian Network Structure Learning

no code implementations12 Apr 2017 Marco Scutari

For discrete Bayesian networks, the canonical choice for a posterior score is the Bayesian Dirichlet equivalent uniform (BDeu) marginal likelihood with a uniform (U) graph prior, which assumes a uniform prior both on the network structures and on the parameters of the networks.

An Empirical-Bayes Score for Discrete Bayesian Networks

no code implementations12 May 2016 Marco Scutari

For discrete Bayesian networks, the canonical choice for a posterior score is the Bayesian Dirichlet equivalent uniform (BDeu) marginal likelihood with a uniform (U) graph prior (Heckerman et al., 1995).

Bayesian Network Constraint-Based Structure Learning Algorithms: Parallel and Optimised Implementations in the bnlearn R Package

no code implementations30 Jun 2014 Marco Scutari

It is well known in the literature that the problem of learning the structure of Bayesian networks is very hard to tackle: its computational complexity is super-exponential in the number of nodes in the worst case and polynomial in most real-world scenarios.

Graphical Modelling in Genetics and Systems Biology

no code implementations14 Oct 2012 Marco Scutari

Graphical modelling has a long history in statistics as a tool for the analysis of multivariate data, starting from Wright's path analysis and Gibbs' applications to statistical physics at the beginning of the last century.

On Identifying Significant Edges in Graphical Models of Molecular Networks

no code implementations5 Apr 2011 Marco Scutari, Radhakrishnan Nagarajan

Results: The improved performance of the proposed approach is demonstrated across the synthetic data sets using sensitivity, specificity and accuracy as performance metrics.

Specificity

Learning Bayesian Networks with the bnlearn R Package

2 code implementations26 Aug 2009 Marco Scutari

bnlearn is an R package which includes several algorithms for learning the structure of Bayesian networks with either discrete or continuous variables.

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