Do productivity measures capture cross-country differences in living standards?
Core argument: Responding to Aghion, Bergeaud and Garicano, the author clarifies that he does not claim European productivity is mismeasured, but that standard productivity measures lack the implications for cross-country comparisons of living standards and welfare that many economists attribute to them.
Phillipe Aghion, Antonin Bergeaud and Luis Garicano have written a discussion of the response to my Europe/US productivity gap. Let me be clear: I am not arguing that European productivity is mismeasured, and never said that. I am, instead, arguing that standard measures of productivity do not have the implications for cross-country comparisons of living standards and economic welfare that many people – including many economists – think they have. I wanted to understand how to reconcile these different rates of productivity growth with the fact that relative European productivity and purchasing power at current prices have not declined. I have no idea why Aghion et al believe that a table showing multiple estimates of higher productivity growth in the US contributes to the discussion. [Aghion, et al argue] “Current PPPs and national deflators are giving sharply different answers to what at first sight looks like the same price question, but as we saw, is not.” Indeed. That’s exactly the point I’ve been trying to make.




