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Each experiment, taken individually, may contain too little information to distinguish some important genes from incidental ones. However, when experiments are combined using the proposed statistical framework, additional power emerges. The fundamental building block of the family of statistical models that we propose is a hierarchical three-groups mixture of distributions. Each gene is modeled probabilistically as belonging to either a null group that is unassociated with PD, a deleterious group, or a beneficial group. This three-groups formalism has two key features. By apportioning prior probability of group assignments with a Dirichlet distribution, the resultant posterior group probabilities automatically account for the multiplicity inherent in analyzing many genes simultaneously. By building models for experimental outcomes conditionally on the group labels, any number of data modalities may be combined in a single coherent probability model, allowing information sharing across experiment types. These two features result in parsimonious inference with few false positives, while simultaneously enhancing power to detect signals. Simulations show that our three-groups approach performs at least as well as commonly-used tools for GWAS and RNA-seq, and in some cases it performs better. We apply our proposed approach to publicly available genome-wide association studies and RNA-seq datasets, discovering novel genes that are potential therapeutic targets.<\/jats:p>","DOI":"10.1093\/biomtc\/ujag090","type":"journal-article","created":{"date-parts":[[2026,5,6]],"date-time":"2026-05-06T11:38:52Z","timestamp":1778067532000},"source":"Crossref","is-referenced-by-count":0,"title":["A three-groups non-local model for combining heterogeneous data sources to identify genes associated with Parkinson\u2019s disease"],"prefix":"10.1093","volume":"82","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-8238-3154","authenticated-orcid":false,"given":"Troy P","family":"Wixson","sequence":"first","affiliation":[{"name":"Colorado State University Department of Statistics, , Fort Collins, CO 80523 ,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8663-536X","authenticated-orcid":false,"given":"Benjamin 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