For each firm which did at least 2 assessments during our period, you can read :
- vertically : the score category of their first assessment
- horizontally : the score category of their last assessment
Every firm in the diagonal stayed in the same score category in their first and last assessment. Firms below the diagonal dropped to a lower score category during their last assessment, and firms above the diagonal upgraded their score category during their last assessment.
Comparaison of scores during the first and last assessment between $FIRST and $LAST