In identifying hotspots the first steps are to understand what the concept of "corruption" covers, and to break it down into manageable and tangible components. Corruption primarily is about a breach of trust. Without spending time on definitions we can take some of the standard descriptions, "abuse of public position/entrusted office for private gain"
Not all corruption, however, is the same and it plays out differently in different contexts It may, therefore, be helpful to see corruption as a set of behaviours.