. >>> want to bring in bill black at university of missouri, kansas city. e best way to rob a bank is to owe one. something you spend a lot of time thinking about and also as a regulator, as a criminologist looking into about what the kind of conditions are that do produce either ethical corner cutting or outright illegal behavior. >> sure. so, we talk about crimnuogenic environments. environments that produce epidemics of fraud and we can give you imperical evidence on the debate you just been having. so, for in the savings and loan crisis, for example, detailed investigations, the report of the national commission found that at a typical large failure, fraud was invariably present. we know that if you use a compensation system, you can produce endemic fraud. so, over 10% of the appraisers signed a petition begging the united states to take action against appraisal fraud. we found in investigations that wamu, washington mutual, had a black list of appraisers and you got on the black list if you refused to inflate the appraisal. now, think about that. there