Antonyms for the term "Economic Models" include illogical, unsound, irrational, insensible, and unwise models. These words imply a lack of reason, purpose, or practicality. While economic models are based upon sound logic and extensive research, their opposite, illogical models, are built on premises without any backing. Likewise, unsound models are based on flawed reasoning or guesswork, while irrational models stem from irrational thinking. Furthermore, insensible models lack coherence or consistency, and unwise models have the potential to cause harm or damage, and as such are not recommended or trusted by experts.