Before revision:  Our "business as usual" completely unconditional forecast has SIE hitting 0 in September by the 2060s . Impulse response functions reveal that anthropogenic \text{CO emission shocks have a permanent effect on SIE - a property shared by no other shock.
After revision:  Our "business as usual" completely unconditional forecast has SIE hitting 0 in September by the 2060s . Impulse response functions reveal that anthropogenic \text{CO emission shocks have an unusually durable effect on SIE - a property shared by no other shock.