Business and Government Agencies

The primary focus of my topic is three fold, first if a high ranking official from a firm were to become the Director of an agency and his former company is asking for approval of a drug, how should the Director act in regard to this rulemaking? The second question is not a difficult, if a former Director were to assume a position at a firm asking for approval of a drug, how should the former directors position influence the decisions of the agency? Finally how could government regulation limit the potential conflicts of interest from the 'Revolving Door'?
The first scenario answer is both…