Ever since NAFTA passed in 1993, the media have been anxious to say how the pact has been a great boon to Mexico, even if its impact on the U.S. might not have been so great. Since Mexico's growth post-NAFTA has actually been pathetic (the gap in per capita income with the United States has increased), the praise has often involved ignoring the data or even just making things up.

The Washington Post gets first prize in the latter category, famously telling readers back in 2007 that NAFTA had caused Mexico's GDP to quadruple in the prior two decades. The actual figure according to the I.M.F. is 83 percent. The Post has never corrected this obvious error, indicating that when it comes to pushing its agenda on trade the Post has as much respect for the truth as Donald Trump.

Anyhow, the promotion of the post-NAFTA Mexican boom continues. The latest guilty party is the Los Angeles Times which devotes a lengthy piece to telling us how the boom is not just good for Mexico, but also the United States. Mexico's per capita GDP growth since 2008 is less than 0.7 percent. This is a growth rate for a developing country that would more typically be described as "pathetic" than a boom.