Alan Blinder, a professor of economics and public affairs at Princeton University, looks at explanations for low productivity growth since 2010, and points to the most likely reason- the lack of technological progress with the kind of impact that the personal computer and other innovations had in the period 1995-2005. Facebook, Google, Amazon and Apple tech innovation has more impact on consumers than on the industrial economy and production. Lower investment since 2010 with the financial crisis could have added to this, but to a smaller degree, says Blinder. Blinder even points to some hours of work being taken up by workers using Facebook, Twitter and other similiar services. The notion strange to Silicon Valley is supported that tech progress, dynamism and entrepreneurship may have actually declined to some extent. Intel's Andy Grove, no stranger to early innovations supported this notion around 2008, saying he saw less innovation of the type he was familiar with, more refinements than breakthroughs by startups in Silicon Valley. Grove was critical of the decline in manufacturing in the U.S., which is likely to have hurt productivity growth....