I find this very ironic. During the mid 00's, Alberto Cavallo initiated the "Billion Prices Project". Alberto was at MIT at the time, and yes he is the son of Domingo. As part of the project, they gathered online prices of many things, from rentals to bread, to hourly wages. The data allowed, among other things, to calculate inflation in "real time" or at least in periods shorter than the monthly reports from the likes of BLS in US and INDEC in Argentina.Their data was freely available online for the US (it tracked fine the BLS reports), Venezuela and Argentina. For the later case it clearly showed a much larger inflation rate than what INDEC was reporting. This attracted lots of heat from the argentine goverment, criticizing the methodology, Cavallo's ancestry, and of course that the whole thing emanated from the US. In those times, Sergio Massa was part of the goverment, most notably as Chief of Staff. Therefore, I consider him part of the INDEC lie. I find ironic that now he is using a similar methodology.
For more on Cavallo's work, see inflacionverdadera.com