Search Results for author: Timo Koski

Found 6 papers, 0 papers with code

Likelihood-free Model Choice for Simulator-based Models with the Jensen--Shannon Divergence

no code implementations8 Jun 2022 Jukka Corander, Ulpu Remes, Timo Koski

Choice of appropriate structure and parametric dimension of a model in the light of data has a rich history in statistical research, where the first seminal approaches were developed in 1970s, such as the Akaike's and Schwarz's model scoring criteria that were inspired by information theory and embodied the rationale called Occam's razor.

Nonparametric likelihood-free inference with Jensen-Shannon divergence for simulator-based models with categorical output

no code implementations22 May 2022 Jukka Corander, Ulpu Remes, Ida Holopainen, Timo Koski

Likelihood-free inference for simulator-based statistical models has recently attracted a surge of interest, both in the machine learning and statistics communities.

Testing for Causality in Continuous Time Bayesian Network Models of High-Frequency Data

no code implementations25 Jan 2016 Jonas Hallgren, Timo Koski

It is calibrated to market data and by the new causality measure it performs better than older models.

Context-specific independence in graphical log-linear models

no code implementations9 Sep 2014 Henrik Nyman, Johan Pensar, Timo Koski, Jukka Corander

Log-linear models are the popular workhorses of analyzing contingency tables.

Labeled Directed Acyclic Graphs: a generalization of context-specific independence in directed graphical models

no code implementations4 Oct 2013 Johan Pensar, Henrik Nyman, Timo Koski, Jukka Corander

We introduce a novel class of labeled directed acyclic graph (LDAG) models for finite sets of discrete variables.

Stratified Graphical Models - Context-Specific Independence in Graphical Models

no code implementations25 Sep 2013 Henrik Nyman, Johan Pensar, Timo Koski, Jukka Corander

Theory of graphical models has matured over more than three decades to provide the backbone for several classes of models that are used in a myriad of applications such as genetic mapping of diseases, credit risk evaluation, reliability and computer security, etc.

Computer Security

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