We do similar or related work at the firm I'm in quite frequently. Mostly we have people that understand Mergers and Acquisitions really well, sets of people that understand industries really well, and people that know technology really well (IT operations, business process and applications, infrastructure, app architecture, etc.). These groups of people put together along with methodologies for quick turn-around on analysis afford us higher rates. There's also an element of these types of engagements where clients almost seem to expect higher rates and expense fees; otherwise we may give the perception of a less than serious service provider while involved with high dollar transactions.