RT Monograph SR 00 A1 Grimaud, André A1 Rouge, Luc T1 Technology Shocks, Directed Technical Progress and Climate Change YR 2025 FD 2025-04-08 VO 25-1633 SP 37 K1 directed technical change K1 endogenous growth K1 technology shocks K1 climate change AB Technical progress is considered a key element in the ght against climate change. It may take the form of technological breakthroughs, that is, shocks that induce signicant leaps in the stock of knowledge. We use an endogenous growth framework with directed technical change to analyze the climate impact of such shocks. Two production subsectors coexist: one subsector is fossil-based, using a non-renewable resource, and yields carbon emissions; the other subsector uses a clean, renewable resource. At a given date, the economy benets from an exogenous technology shock. We fully characterize the general equilibrium and analyze how the shock modies the economys trajectory. The overall e¤ect on carbon emissions basically depends on the substitutability between the production subsectors, the initial state of the economy, and the nature and size of the shock. We notably show that green technology shocks induce higher short-term carbon emissions when the two subsectors are gross complements, but also in numerous cases when they are gross substitutes. T2 TSE Working Paper PB TSE Working Paper PP Toulouse AV Published LK https://publications.ut-capitole.fr/id/eprint/50749/ UL http://tse-fr.eu/pub/130495