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Chapter 9 Model selection criteria with bootstrap algorithms: applications in biological networks

  • Mehmet Ali Kaygusuz und Vilda Purutçuoğlu
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Abstract

Model selection methods play a fundamental role in both classical and modern statistical theories. Owing to the technological advancements, we now have more data in fields such as engineering, medicine and finance. Consequently, the estimation in high-dimensional graphical models and the selection of the regularization parameter embedded in these models under high dimensions have become more important. Therefore, many model selection criteria have been suggested in the literature such as “Akaike’s information criterion” and the “Bayesian information criterion” as wellknown approaches, as well as some extended versions, such as the “consistent Akaike information criterion with Fisher information” and “information and complexity selection” methods. In this study, we used the aforementioned four approaches to evaluate their performance for sparse biological networks by including bootstrap strategies. Specifically, we applied the nonparametric bootstrap, known as the Efron method, and the Bayesian bootstrap method due to the fact that in real data, the number of observations per genomic random variable is typically very limited. Thus, we overcame this limitation by augmenting sample sizes in the selection of the optimal model. We tested the accuracy of our results on two real and two simulated datasets.

Abstract

Model selection methods play a fundamental role in both classical and modern statistical theories. Owing to the technological advancements, we now have more data in fields such as engineering, medicine and finance. Consequently, the estimation in high-dimensional graphical models and the selection of the regularization parameter embedded in these models under high dimensions have become more important. Therefore, many model selection criteria have been suggested in the literature such as “Akaike’s information criterion” and the “Bayesian information criterion” as wellknown approaches, as well as some extended versions, such as the “consistent Akaike information criterion with Fisher information” and “information and complexity selection” methods. In this study, we used the aforementioned four approaches to evaluate their performance for sparse biological networks by including bootstrap strategies. Specifically, we applied the nonparametric bootstrap, known as the Efron method, and the Bayesian bootstrap method due to the fact that in real data, the number of observations per genomic random variable is typically very limited. Thus, we overcame this limitation by augmenting sample sizes in the selection of the optimal model. We tested the accuracy of our results on two real and two simulated datasets.

Heruntergeladen am 12.12.2025 von https://www.degruyterbrill.com/document/doi/10.1515/9783110717655-009/html
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