I sometimes hear the claim that innovation in the physical world has stagnated since around 1970. More specifically, chapter 1 of The Rise and Fall of American Growth by Robert J Gordon claims that there has been basically no innovation in clothing other than changes in fashion. This is somewhat contrary to my intuition (although I definitely believe that innovation in the 50 years before 1970 was greater that in the 50 years after), and price of insulation seems like a relatively objective metric for this.
My favourite type of response would be time series data of clo per inflation-adjusted dollar, but I'd also appreciate people's subjective experience of this.
The link is 451 for me: "Unavailable due to legal reasons". The specifics:
Prima facie that looks like bullshit, but recognising that doesn't get me the web page. Time I looked into a VPN account. Any suggestions?
BTW, mousing over the same link on your web page gives me a popup saying "Too many requests", which none of the others do. What's up there?