TY - JOUR ID - publications22151 UR - http://tse-fr.eu/pub/30524 IS - n°4 A1 - Amigues, Jean-Pierre A1 - Lafforgue, Gilles A1 - Moreaux, Michel Y1 - 2015/10// N2 - Carbon capture and storage (CCS) is one of the most promising abatement options to curb CO2 emissions of the energy sector. Usually, in models where the atmospheric carbon stock is constrained to not exceed a given ceiling and under constant average costs, it is never optimal to deploy CCS before the time at which this ceiling is reached. In this paper, we show that, when the CCS technology is submitted to decreasing returns to scale, abatement activities must begin earlier, i.e. before the climate constraint binds. It must also cease strictly before the end of the ceiling period. PB - Economics Bulletin JF - Economics Bulletin VL - vol.35 SN - 1545-2921 TI - Optimal timing of carbon sequestration policies SP - 2242 AV - none EP - 2251 ER -