# Data setup

This directory exists because the public repository cannot redistribute the original raw/source files. It downloads script-accessible sources, checks user-provided source files, rebuilds model-ready inputs, and compares them with the committed files in `../data/`.

The main estimation workflow does not run these scripts. Once the five model-ready CSVs exist in `data/`, fitting and post-estimation are Julia/Stan-only.

The setup workflow never overwrites committed files in `data/`.

Put raw source files in `_local/raw/` or set `PARTY2D_RAW_DATA_DIR` to another local directory. See `source_manifest.csv` and the source notes below for source-specific access requirements.

## What downloads automatically?

`data-setup/R/01_download_sources.R` downloads source files that are script-accessible under the providers' terms and reports sources that require credentials or manual local files.

| Source | Automatic? | Requirement |
| --- | --- | --- |
| PolDem | Yes | none |
| PartyFacts crosswalk | Yes | none |
| CHES family files | Yes | none where provider links are live |
| POPPA | Yes | none; downloaded from Harvard Dataverse |
| Global Party Survey 2019 | Yes | none; downloaded from Harvard Dataverse |
| V-Party | Yes, with provider form details | set `PARTY2D_VDEM_EMAIL`; optionally set `PARTY2D_VDEM_GENDER` |
| Manifesto Project | Yes, with credentials | set your own `MANIFESTO_API_KEY` or `PARTY2D_MANIFESTO_API_KEY` |
| Morgan historical expert data | No | place `morgan_positions_raw.csv` locally; available on request |

Do not commit downloaded or user-provided source files.

Recommended local layout:

```text
_local/raw/
  manifesto/MPDataset_MPDS2025a.csv
  poldem/poldem-election_all.csv
  ches/...
  vparty/...
  poppa/...
  gps/...
  morgan/...
  partyfacts/partyfacts-external-parties.csv
```

Local output layout:

```text
_local/build/             # intermediate processing files
_local/generated-inputs/  # regenerated final model-input CSVs
_local/reports/           # comparison reports
```

## Commands

Run the full source-data setup workflow with:

```bash
bash data-setup/run_data_setup.sh
```

The command downloads script-accessible sources, checks required local files,
rebuilds model-ready inputs under `_local/generated-inputs/`, and writes a
comparison report under `_local/reports/`. It never replaces committed files in
`data/`.

V-Party:

```bash
export PARTY2D_VDEM_EMAIL='you@example.org'
export PARTY2D_VDEM_GENDER=''   # blank means prefer not to say
```

Manifesto Project:

```bash
export MANIFESTO_API_KEY='...'
# or
export PARTY2D_MANIFESTO_API_KEY='...'
```

Morgan is not a public provider download. The local OCR/transcription file can be provided on request and should be placed at:

```text
_local/raw/morgan/morgan_positions_raw.csv
```

The comparison writes `_local/reports/input_comparison.md`. Replacing committed inputs, if ever needed, is a separate manual decision and is not done by these scripts.

Known behavior: the current public/rebuilt sources run through the workflow successfully, but regenerated `text_data.csv`, `expert.csv`, and `lr_data.csv` are not byte-identical to the committed model-ready inputs because of source-version and linkage differences. The comparison report records those differences explicitly.
