Reproduction Materials for "Forgotten but not gone: A multi-state analysis of modern-day debt imprisonment."

Bulk data downloads

Install python 3 if you do not have it. Then, run the following commands from the command line:

git clone [email protected]:stanford-policylab/debt
cd debt

# Example uses:
./download.py --all                                           # Download all data
./download.py --state wi --subgeo milwaukee_county            # Download data for a specific county
./download.py --all --download-dir /tmp/debt                  # Download the data to /tmp/debt
./download.py --state wi --subgeo milwaukee_county --type csv # Download as CSV instead of RDS

Reproduction

To reproduce our analysis, download all of the data into the data/repro subdirectory:

./download.py --all --download-dir data/repro

Once the data have downloaded, ensure that you have groundhog installed and are using R version 4.3.1. Then, simply knit the main.Rmd file in the root of this directory.

Rscript -e "knitr::knit('main.Rmd')"

Reprocessing Data

Data processing is carried out in a number of steps. A large number of helper functions for the seven major steps—rectangularization, classification, parsing, deduplication, imputation, standardization, and sanitization—can be found in the lib directory under the corresponding R script. Higher level functions for managing data processing are contained in lib/debt.R.

When a new county is initialized with the init script, a number of sub directories within the data directory are created for it:

• raw: This directory holds the raw data, as originally given to us by the county jail.
• raw_txt: This directory holds text extracted from the raw data, usually using tools such as pdftotext or tabula, or the to_txt.py utility.
• raw_csv: This directory holds data in CSV format that can be ingested by R, either because it was directly extracted in a usable format, e.g., using our to_csv.py utility, or one of the scripts in lib/extract/, or, in some cases, location-specific cleaning scripts.
• clean: This directory holds data in CSV and RDS formats that have been cleaned and standardized.

Converting raw data into CSV files that can be manipulated in R is the first step of the pipeline (i.e., going from the raw directory to the raw_csv directory), which we term "rectangularization":

1. Rectangularization: First, raw data must be converted to CSV format. This is accomplished by converting the raw data to a CSV using one of the conversion utilities in lib/utils or lib/pdf.R, or with tabula. In some cases, e.g., due to special visual formatting, additional conversion is required. Scripts for converting specific report types can be found in lib/xtract. In some cases, due to unusual visual formatting or structure, additional location-specific processing is performed on a location-by-location basis to rectangularize the data.

Data processing (i.e., going from the raw_csv directory to the clean directory`) is undertaken at the location level, according to the following steps:

2. Classification: Once data have been rectangularized, the columns must be classified according to the overall data schema. First, an automatic pass using cosine similarity is attempted by calling debt_classify() from lib/debt.R. This classification is confirmed (and modified, as appropriate) using the shiny app in lib/audit/app.R.

The remaining steps are carried out automatically by calling debt_process() or debt_process_all() after sourcing debt.R.

3. Parsing: The raw contents of the classified columns are parsed according to a standard schema (i.e., "WF" is converted to "white" in the race column and "female" in the gender column). (See lib/parse.R.)
4. Deduplication: Each charge present at the time of booking is separated into a distinct row, and rows representing the same charge at the time of booking are combined. (See lib/dedupe.R.)
5. Imputation: Features not included in the data but which can be reasonably inferred from the data—most notably, whether the booking represents a failure-to-pay booking, but also ages, length of stay, ethnicity, etc.—are imputed. (See lib/impute.R.)
6. Standardization: Parsed values are coerced to the correct types, and values are checked to ensure that incorrect values resulting from clerical errors (such as ages greater than 100 or less than 15) are removed. (See lib/standardize.R and lib/standards.R.)
7. Sanitization: Unparsed personally identifying information is removed from free text fields. (See lib/sanitize.R.)

Due to the dependency on the poster R library, which in turn has a dependency on the libpostal C library, the data cleaning code cannot be run in a virtual environment with renv or groundhog. We are working on a solution using Spack, and will update this repository with instructions for recreating the data cleaning environment once that process is complete.

Raw data and location-specific processing scripts are available only by request.