Nikolaus, in addition to the interesting perspectives you raised about mergers & acquisitions, the largest factor driving consolidation right now is the pending retirements of firm owners, many of who founded firms in the 1970s. Because of a dearth of younger architects interested in ownership these Baby Boomers have far fewer transition options than a decade ago. And closing a firm, whether it is smaller or mid-sized firm, is seldom an option because of the ongoing professional liabilities, even after a 2 or 3-year tail end E&O policy is purchased.
For a good list of factors driving the consolidation, and how smaller firms can prepare for this, readers might want to purchase the Ownership Transition chapter of AIA's
Architects' Handbook of Professional Practice, 15th edition, which is available from AIA for, I believe, $19.95. (Disclaimer: I authored this section; however I don't receive any of the proceeds. Simply my 15 minutes of fame).
Relative to your question about "is bigger better," there are many examples throughout many industries of companies that became "too big to succeed." They lose touch with their clientele, no one has ownership of specific initiatives, decisions take too long to make, and the company gets mired in a giant morass of systems and procedures. Hopefully, as architecture firms consolidate and grow in size, which is increasingly inevitable, they will learn how to avoid the "too big to succeed" syndrome.
-------------------------------------------
Michael Strogoff FAIA
President
Strogoff Consulting
Mill Valley CA
-------------------------------------------