From the AMLAW listing for 2017, I looked at the 25 top law firms in terms of gross revenue. As to which of them have conducted or taken part in data-oriented research surveys, my investigations so far consist of searching for the name of the firm and the word “survey” using Google and then scanning down the first five or six pages of hits. The better method would be to search on the website of the firm itself, which should take place eventually.
In any case, at this point it appears that 16 of the 25 highest grossing U.S. law firms have not been involved in a research survey. In the plot below, they are the firms that have no green bar: Latham Watkins, Kirkland Ellis, Skadden Arps, Jones Day, Sidley Austin (which tried a survey a couple of years ago but didn’t complete it), Morgan Lewis, Gibson Dunn, Greenberg Traurig, Sullivan Cromwell (although I ran across a reference to a survey done in 2010 about Boards of Directors), Simpson Thacher, Cleary Gottlieb, Weil Gotshal, Paul Weiss, Quinn Emanuel, Davis Polk, and Wilmer Cutler.
The other nine firms are known to have sponsored at least one research survey, and six of them have been involved in more than one. The laurel wreath goes to DLA Piper, which at 28 surveys known to me almost equals the combined 32 of the other eight firms.
The plot sorts the law firms in descending order by gross revenue, which shows that five the top 12 firms have put this tool to use. Overall, however, the majority of these elite, huge U.S. law firms have not seen sufficient reason to take part in or publish a research survey.