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Update version to 2.1.33 and enhance Stan models with non-negative co…#280

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improvements-stefanofrom
constrain-random_effect_sigma_sigma-to-avoid-unidentifiability
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Update version to 2.1.33 and enhance Stan models with non-negative co…#280
stemangiola wants to merge 4 commits into
improvements-stefanofrom
constrain-random_effect_sigma_sigma-to-avoid-unidentifiability

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…nstraints for random effect parameters. This change ensures backward compatibility while improving the handling of random effects in the glm_multi_beta_binomial models.

…nstraints for random effect parameters. This change ensures backward compatibility while improving the handling of random effects in the glm_multi_beta_binomial models.
Refactor Stan models to ensure backward compatibility with random effect parameters. Update comments for clarity and maintain consistency in handling sigma_sigma across models, fixing its value to 1.0 during sampling while retaining the original structure for saved fits.
This commit modifies the handling of hyperprior parameters in the Stan models, specifically setting sigma_mu to 0.0 and sigma_sigma to 1.0 for backward compatibility. Comments have been updated for clarity, ensuring that the changes are well-documented and consistent across the glm_multi_beta_binomial models.
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