[ckemere]

(Ironically, my dad won an award as a USDA bureaucrat for the economic analysis and rule set that allowed Mexican avocados into the US.)

When you remove a barrier to a market the intersection of supply and demand curves shifts to the right (more supply) and the equilibrium price drops and the equilibrium supply increases. “Why does this happen?” is more correctly explained by “the supply increased” because the supply curve is what changed, not the demand curve. Note that the article argues for a subsequent change in the demand curve, fueled by tax-funded advertising.