If you’re asking what’s the most common practice area, then at my firm that’s corporate, as will be the case at many of these firms. That’s very noticeable in some departments including intellectual property, real estate and employment, where they might serve as support teams for corporate. They’re huge revenue drivers and an acquisition requires input from many different departments.
But that’s not exclusive to corporate: departments cross over all the time, that might be a simple case of asking the litigation team a question about the possible consequences of a particular course of action, or it may be having the tax partner join in on a call with a client, providing his or her thoughts on a potential structure.
That’s why law firms pitch their full-service offering. A client would rather have one firm which can service the various needs of their project rather than constantly shopping every time a new question comes up. Although note, they probably have a few (rather than one) which work with them on different activities i.e. some firms will be better for litigation or restructuring.
This is where the international capability also comes in. You don’t want to tell a client you don’t have the capability or worse, give incorrect advice. So if an international question comes up, which it does all the time, you’ll call the Spanish office or your relationship-firm about the consequences of incorporating a shell company there or to get a legal opinion in a financing transaction.