Writing a book may seem akin to locking the gate after the horse has bolted—that is, analysing the causes for the failure of the regulatory laws and their appropriateness after its occurrence and in proposing changes in the law to prevent it from recurring in future. Nevertheless, to advance the social science of law, it is necessary for a researcher to go into the underlying principles or reasons behind the law. The enquiries conducted consist of the reason(s) for adopting particular rules (or regulations) and their effects. The question of whether these regulations are suited to the present conditions is also asked, and if not, what possible improvements are required? Do the current regulations require replacing by a new set of rules?1 Legal research requires systematically finding or ascertaining law. This can be on the identified topic (for example, in this book it is credit rating agencies) or the types of regulations introduced (for example—self-regulation, statutory regulation and case law regulation), as well as an inquiry into specific jurisdictions (the laws of the US and the EU) with a view to making advancement in the science of law. This in turn requires a legal researcher to probe systematically into the underlying principles of, and reasons for, law (or regulation).