Guy Rolnik writes,

Looking at both intangible investments and political activities to explain the 20% rise in Tobin’s q in the U.S. since 1970, a new working paper by James Bessen from Boston University concludes that activity associated with increased Federal regulation is the most important explanatory factor, especially after 2000. In fact, spending on R&D and other intangibles has fallen relative to conventional assets since 2000.

Noting that operating margins for these firms have also risen since 1990 by over 2% in aggregate, Bessen’s study also found that variables associated with regulation and corporate campaign contributions account for about half of this increase.

Pointer from Mark Thoma. The article is a long interview with Bessen, interesting throughout. For example,

In 2011 a new patent law passed, the Leahy-Smith America Invents Act. This patent law was essentially negotiated between a small number of large pharma companies and a small number of large tech companies.

…all of a sudden you have a whole lot of small businesses in every state in the country who are now upset about getting sued for patent infringement over these very ridiculous claims.

Once again, I wonder how much of the trend toward industry consolidation and loss of dynamism in the past twenty years is due to regulation and rent-seeking.