OTTAWA — As one MP put it this week, parliamentary budget officer Yves Giroux has been in the news “almost as much” as Taylor Swift these days, as the parties debate his studies of the federal carbon tax’s impact on Canadians’ wallets.

Both Liberals and Conservatives have been extensively citing the PBO’s reports in attempting to justify their respective stances on the carbon tax, which goes up April 1, and the governments tax rebates.