It would be helpful to clarify your questions. Corruption is defined as 'dishonest or fraudulent conduct by those in power, typically involving bribery.' This often leads to a de jure interpretation. Clear cut corruption. For example, a businessman giving a politician a bag of money and that politician carrying out the businessman's bidding. By comparison a de facto interpretation would look at other kinds of transactions and overall voting patterns. De jure may tend to underestimate and de facto overestimate, so a framework may be helpful.