in case of a price policy say a carbon tax c reductions driven by the re policy could possibly add to the c reductions driven by the carbon tax depending on the strength of each in case of a hybrid policy such as an ets with a price floor a reduction of the carbon price resulting from the re policy could possibly lead to additional c emission reductions inasmuch the carbon price were to fall below the level of the price floor technological paths might very much depend on initial conditions as such technologies having small shortterm advantages may lockin the technical basis of a society into technological choices that may have lesser longterm advantages than technologies that are lockedout