Search Results for author: Jose M. Peña

Found 22 papers, 0 papers with code

Deep Learning With DAGs

no code implementations12 Jan 2024 Sourabh Balgi, Adel Daoud, Jose M. Peña, Geoffrey T. Wodtke, Jesse Zhou

As non-parametric causal models, DAGs require no assumptions about the functional form of the hypothesized relationships.

Causal Inference

On the Probability of Immunity

no code implementations21 Sep 2023 Jose M. Peña

This work is devoted to the study of the probability of immunity, i. e. the effect occurs whether exposed or not.

Bounding the Probabilities of Benefit and Harm Through Sensitivity Parameters and Proxies

no code implementations8 Mar 2023 Jose M. Peña

We present two methods for bounding the probabilities of benefit and harm under unmeasured confounding.

Decision Making

$ρ$-GNF : A Novel Sensitivity Analysis Approach Under Unobserved Confounders

no code implementations15 Sep 2022 Sourabh Balgi, Jose M. Peña, Adel Daoud

We propose a new sensitivity analysis model that combines copulas and normalizing flows for causal inference under unobserved confounding.

Causal Inference

Simple yet Sharp Sensitivity Analysis for Unmeasured Confounding

no code implementations27 Apr 2021 Jose M. Peña

We present a method for assessing the sensitivity of the true causal effect to unmeasured confounding.

On the Non-Monotonicity of a Non-Differentially Mismeasured Binary Confounder

no code implementations20 Jan 2021 Jose M. Peña

Suppose that we are interested in the average causal effect of a binary treatment on an outcome when this relationship is confounded by a binary confounder.

On the Monotonicity of a Nondifferentially Mismeasured Binary Confounder

no code implementations27 May 2020 Jose M. Peña

Suppose that we are interested in the average causal effect of a binary treatment on an outcome when this relationship is confounded by a binary confounder.

Factorization of the Partial Covariance in Singly-Connected Path Diagrams

no code implementations12 Feb 2020 Jose M. Peña

We extend path analysis by showing that, for a singly-connected path diagram, the partial covariance of two random variables factorizes over the nodes and edges in the path between the variables.

Unifying Gaussian LWF and AMP Chain Graphs to Model Interference

no code implementations11 Nov 2018 Jose M. Peña

An intervention may have an effect on units other than those to which it was administered.

Identifiability of Gaussian Structural Equation Models with Dependent Errors Having Equal Variances

no code implementations21 Jun 2018 Jose M. Peña

Specifically, we prove identifiability for the Gaussian structural equation models that can be represented as Andersson-Madigan-Perlman chain graphs (Andersson et al., 2001).

Identification of Strong Edges in AMP Chain Graphs

no code implementations23 Nov 2017 Jose M. Peña

However, the directed edges in the essential graph are not necessarily strong or invariant, i. e. they may not be shared by every member of the equivalence class.

Unifying DAGs and UGs

no code implementations29 Aug 2017 Jose M. Peña

We introduce a new class of graphical models that generalizes Lauritzen-Wermuth-Frydenberg chain graphs by relaxing the semi-directed acyclity constraint so that only directed cycles are forbidden.

Causal Effect Identification in Acyclic Directed Mixed Graphs and Gated Models

no code implementations22 Dec 2016 Jose M. Peña, Marcus Bendtsen

We introduce a new family of graphical models that consists of graphs with possibly directed, undirected and bidirected edges but without directed cycles.

Representing Independence Models with Elementary Triplets

no code implementations4 Dec 2016 Jose M. Peña

In an independence model, the triplets that represent conditional independences between singletons are called elementary.

Alternative Markov and Causal Properties for Acyclic Directed Mixed Graphs

no code implementations18 Nov 2015 Jose M. Peña

We extend Andersson-Madigan-Perlman chain graphs by (i) relaxing the semidirected acyclity constraint so that only directed cycles are forbidden, and (ii) allowing up to two edges between any pair of nodes.

Factorization, Inference and Parameter Learning in Discrete AMP Chain Graphs

no code implementations27 Jan 2015 Jose M. Peña

We address some computational issues that may hinder the use of AMP chain graphs in practice.

Every LWF and AMP chain graph originates from a set of causal models

no code implementations10 Dec 2013 Jose M. Peña

This paper aims at justifying LWF and AMP chain graphs by showing that they do not represent arbitrary independence models.

Selection bias

Error AMP Chain Graphs

no code implementations28 Jun 2013 Jose M. Peña

We will also show that every EAMP CG under marginalization of the error nodes is Markov equivalent to some LWF CG under marginalization of the error nodes, and that the latter is Markov equivalent to some directed and acyclic graph (DAG) under marginalization of the error nodes and conditioning on some selection nodes.

Selection bias

Marginal AMP Chain Graphs

no code implementations3 May 2013 Jose M. Peña

For Gaussian probability distributions, we also show that every MAMP chain graph is Markov equivalent to some directed and acyclic graph with deterministic nodes under marginalization and conditioning on some of its nodes.

Selection bias

Learning AMP Chain Graphs and some Marginal Models Thereof under Faithfulness: Extended Version

no code implementations4 Mar 2013 Jose M. Peña

In particular, we present a constraint based algorithm for learning an AMP chain graph a given probability distribution is faithful to.

Approximate Counting of Graphical Models Via MCMC Revisited

no code implementations30 Jan 2013 Jose M. Peña

In Pe\~na (2007), MCMC sampling is applied to approximately calculate the ratio of essential graphs (EGs) to directed acyclic graphs (DAGs) for up to 20 nodes.

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