"Responding in October 2018 to Open Europe's report on the long-term economic consequences of a No Deal Brexit, the academics Anand Menon and Jonathan Portes said that Open Europe had successfully used "mainstream modelling techniques and assumptions that, while certainly debatable and arguably overoptimistic, are not as bad as some.They are not remotely comparable to the simple factual, logical and legal errors that enabled some 'economists for free trade' to produce projections that no serious trade economist regards as credible at a Commons event."