# Calculates Disproportionate Impact When Binary Success Data are Disaggregated by Subgroups

Implements methods for calculating disproportionate impact: the percentage point gap, proportionality index, and the 80% index. California Community Colleges Chancellor's Office (2017). Percentage Point Gap Method. < https://www.cccco.edu/-/media/CCCCO-Website/About-Us/Divisions/Digital-Innovation-and-Infrastructure/Research/Files/PercentagePointGapMethod2017.ashx>. California Community Colleges Chancellor's Office (2014). Guidelines for Measuring Disproportionate Impact in Equity Plans. < https://www.cccco.edu/-/media/CCCCO-Website/Files/DII/guidelines-for-measuring-disproportionate-impact-in-equity-plans-tfa-ada.pdf>.

The `DisImpact` R package contains functions that help in determining Disproportionate Impact (DI) based on the following methodologies:

1. Percentage Point Gap (PPG) method,
2. Proportionality Index method (method #1 in reference), and
3. 80% Index (method #2 in reference).

## Tutorial

A vignette on how to use the package can be found here.

# News

• 0.0.4

• For functions related to the percentage point gap method, add `prop_sub_0` and `prop_sub_1` parameters to account for scenarios where the `proportion` contains 0 or 1 to not lead to a zero MOE when `use_prop_in_moe=TRUE`. Also, add warning messages when this happens.
• 0.0.3

• Document definition of `di_indicator` in `di_ppg`
• Change `pct_hi < reference` to `pct_hi <= reference` in determining DI to be consistent with the methods document from the Chancellor's office

# Reference manual

install.packages("DisImpact")

0.0.14 by Vinh Nguyen, 7 months ago

https://github.com/vinhdizzo/DisImpact

Report a bug at https://github.com/vinhdizzo/DisImpact/issues

Browse source code at https://github.com/cran/DisImpact

Authors: Vinh Nguyen [aut, cre]

Documentation:   PDF Manual

Imports dplyr, rlang, tidyselect, purrr, tidyr

Suggests knitr, rmarkdown, ggplot2, forcats, scales

See at CRAN