Abstract
Abstract In a Hotelling model with a climate coalition and a free-riding fringe, we compare demand-side and supply-side climate policies aimed at keeping CO$_2$ concentration below a ceiling equivalent to global warming of $2^\circ{\rm C}$. With the demand-side policy, the coalition caps its fuel demand. The corresponding allocation is intra-temporally distorted. With the supply-side policy, the coalition purchases deposits. The corresponding allocation is inter-temporally distorted and the fuel extraction path can be discontinuous. In an empirically calibrated economy, a medium-sized (the grand) coalition is stable with the demand-side (supply-side) policy. If the coalition acts strategically, the stable grand coalition implements first best.
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