Adding additional data and analysis for second investigation

[ben-tanen]

As part of a subsequent investigation on racial inequities in the liver transplant system, we are appending our first investigation's existing repository to include the additional data files and analysis notebooks that we used for the second investigation.

These include: (1) newly updated data from IHS regarding unmet service requests [see 01_data/raw/08_ihs_unmet_need], (2) two new analysis notebooks [09_racial_discrepancies, 10_ihs_unmet_need_reports; see 02_analysis].

For a more complete explanation of these additions and our approach, see the methodology for our second investigation.