GPT-5 is very good at this, so I posed the question and here is the answer.  Excerpt: Schumpeterian growth, made operational.With Peter Howitt, Aghion’s 1992 Econometrica paper formalized growth “through creative destruction”: quality‑improving (vertical) innovations by entrants and incumbents drive productivity while rendering old technologies obsolete. The model delivers dynamic equilibrium, transitional dynamics (including no‑growth […]