Political Scientist at the University of Manchester Co-Director of the British Election Study https://www.jack-bailey.co.uk
![Here are the errors and potential issues I identified:
### 1. Logical/Typo Issues
- 006_unit_tests.R (Test 11): The test name is listed as "rank_size(v, s) = 0". However, the rank_size function in 001_functions.R returns a boolean
(TRUE or FALSE). The test script checks for index = FALSE to identify
errors. Therefore, the test name is misleading; it should likely be
"rank_size(v, s) = TRUE" or something indicating that the number of
violations is zero.
### 2. Modeling & Statistical Issues
- 007_fit_models.R (Model comb_full): In the non-linear model specification for comb_full, several parameters are defined via nlf() (including beta, theta, tmin, etc.), but only lambda has an explicit prior assigned
(models$priormodels$model = "comb_full"][[1]] < prior(normal(0, 0.5),
class = "b", nlpar = "lambda")). While brms will apply default priors to the
other non-linear parameters, it is considered best practice in Bayesian modeling to explicitly specify priors for all estimated parameters to ensure stability and control over the model.
### 3. Code Style & Robustness
- 004_subset_simple_systems.R: The script uses the base Rifelse) function within a tidyverse pipeline (e.g., when calculating m). In this context, it is more idiomatic and safer to use dplyr:: if_else(), which provides stricter type checking.
- 001_functions.R (Theme): The theme _threshold function specifies base_family = "Ubuntu Sans"
• This requires the "Ubuntu Sans" font to be installed on the
operating system; otherwise, R will produce warnings during plot generation.
### 4. External Dependencies
The research project relies on several external components that must be correctly configured in your environment for the scripts to run successfully:
- R Packages: electoral (used in 001_functions. R), countrycode, vdemdata, and cdstan (used for the Bayesian backend in 007_fit_models. R).
- System Software: A working installation of Stan is required for the cdstanr backend used in the modeling stage.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:kuqaskeln2elxcisr2dthbqm/bafkreigs5eiamhqhzfpuxnop6jztxdtlkmff552xvvn67xmj7nnqmc3vgi)
Political Scientist at the University of Manchester Co-Director of the British Election Study https://www.jack-bailey.co.uk