LBSR illustrative case: Reconstructed coding book, synthetic datasets, validation materials and sensitivity-analysis outputs

This dataset supports the illustrative case used to validate the Legacy Behavioural Survey Reconstruction (LBSR) Toolkit. It contains a reconstructed master coding book, a 66-record synthetic item-level dataset, a composite dataset derived from the same synthetic records, complete outputs from a 45-run sensitivity analysis, a validation report, a data dictionary, provenance documentation and SHA-256 checksums. The deposited materials distinguish documentary evidence, derived information and synthetic data. The synthetic datasets reproduce documented aggregate constraints and methodological assumptions but do not represent recovered historical respondents. Multiple respondent-level datasets may satisfy the same aggregate evidence; consequently, the deposited records must not be interpreted as original observations or used to make unsupported population-level inferences. The package contains no original respondent-level records, personal identifiers or email addresses. Original source documents and other materials subject to copyright, confidentiality or data-protection restrictions are not included. The dataset supplements LBSR v0.5.1, archived at https://doi.org/10.5281/zenodo.21444015.