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Add additional stan model for joint likelihood #36

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cm401 merged 10 commits into
mainfrom
stan_model_changes
May 4, 2026
Merged

Add additional stan model for joint likelihood #36
cm401 merged 10 commits into
mainfrom
stan_model_changes

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@cm401

@cm401 cm401 commented May 4, 2026

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This PR adds the additional stan model (using a joint rather than factorised likelihood).

  • Include some analysis code to compare factorised and joint likelihood
  • Add test.
  • Refactor code to allow any part of the code to specify if the factorised (default) or joint likelihood should be used.

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Pull request overview

Adds a second Stan model variant that uses a joint (rather than factorised) order-statistic likelihood for summary types 1/2, plus helper code to select/compile the desired model and analysis scripts to compare outputs.

Changes:

  • Introduces a new Stan program hierarchical_data_synthesis_summary_stats_joint.stan implementing a joint density for three order statistics.
  • Adds an exported R helper compile_stan_model() (with Rd + NAMESPACE update) to compile either the factorised or joint model.
  • Updates/introduces analysis scripts to toggle between Stan models and compare factorised vs joint results, plus basic tests for argument validation.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 6 comments.

Show a summary per file
File Description
tests/testthat/test-utils.R Adds tests around compile_stan_model() argument validation.
R/utils.R Adds exported compile_stan_model() helper to select model file and compile via rstan.
NAMESPACE Exports compile_stan_model (roxygen-generated).
man/compile_stan_model.Rd Roxygen-generated documentation for the new helper.
inst/stan/hierarchical_data_synthesis_summary_stats_joint.stan New joint-likelihood Stan model for type-1/2 summaries.
analysis/new_simulation_study.R Adds a STAN_MODEL switch to compile factorised vs joint model.
analysis/main_analysis.R Adds a STAN_MODEL switch to compile factorised vs joint model.
analysis/compare_factorised_vs_joint.R New analysis script to refit joint model and produce comparison outputs/tables.

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Comment thread tests/testthat/test-utils.R
Comment thread analysis/main_analysis.R
Comment thread analysis/new_simulation_study.R
Comment thread analysis/compare_factorised_vs_joint.R Outdated
Comment thread inst/stan/hierarchical_data_synthesis_summary_stats_joint.stan
Comment thread inst/stan/hierarchical_data_synthesis_summary_stats_joint.stan Outdated

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Pull request overview

Copilot reviewed 8 out of 9 changed files in this pull request and generated 6 comments.


💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

Comment thread inst/stan/hierarchical_data_synthesis_summary_stats_joint.stan
Comment thread analysis/compare_factorised_vs_joint.R
Comment thread analysis/main_analysis.R
Comment thread analysis/new_simulation_study.R
Comment thread R/utils.R
Comment thread analysis/new_simulation_study.R
@cm401 cm401 merged commit 3bcec3d into main May 4, 2026
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2 participants