Krugman discussing the Internet might be like geohot discussing economics.
Or are you referring to the fact that he said it didn’t show up as having caused growth in the underlying economic data? I think he was pointing out something quantitative at the time, and in recent years he speculated that the strong growth in US GDP was finally reflecting efficiency and productivity gains from IT and the Internet. (The US’s strong growth until very very recently was an outgrowth of strong and rare increases in worker productivity.)
Or are you referring to the fact that he said it didn’t show up as having caused growth in the underlying economic data? I think he was pointing out something quantitative at the time, and in recent years he speculated that the strong growth in US GDP was finally reflecting efficiency and productivity gains from IT and the Internet. (The US’s strong growth until very very recently was an outgrowth of strong and rare increases in worker productivity.)