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Climate Policy When the Distant Future Matters: Catastrophic Events with Hyperbolic Discounting AgEcon
Karp, Larry S.; Tsur, Yacov.
Low probability catastrophic climate change can have a significant influence on policy under hyperbolic discounting. We compare the set of Markov Perfect Equilibria (MPE) to the optimal policy under time-consistent commitment. For some initial levels of risk there are multiple MPE; these may involve either excessive or insufficient stabilization effort. These results imply that even if the free-rider problem amongst contemporaneous decision-makers were solved, there may remain a coordination problem amongst successive generations of decision-makers. A numerical example shows that under plausible conditions society should respond vigorously to the threat of climate change.
Tipo: Working or Discussion Paper Palavras-chave: Abrupt climate change; Event uncertainty; Catastrophic risk; Hyperbolic discounting; Markov Perfect Equilibria; Environmental Economics and Policy; Risk and Uncertainty; C61; C73; D63; D99; Q54.
Ano: 2007 URL: http://purl.umn.edu/7186
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CLIMATE POLICY WHEN THE DISTANT FUTURE MATTERS: CATASTROPHIC EVENTS WITH HYPERBOLIC DISCOUNTING AgEcon
Karp, Larry S.; Tsur, Yacov.
Low probability catastrophic climate change can have a signifcant influence on policy under hyperbolic discounting. We compare the set of Markov Perfect Equilibria (MPE) to the optimal policy under time-consistent commitment. For some initial levels of risk there are multiple MPE; these may involve either excessive or insufficient stabilization effort. These results imply that even if the free-rider problem amongst contemporaneous decision-makers were solved, there may remain a coordination problem amongst successive generations of decision-makers. A numerical example shows that under plausible conditions society should respond vigorously to the threat of climate change.
Tipo: Working or Discussion Paper Palavras-chave: Abrupt climate change; Event uncertainty; Catastrophic risk; Hyperbolic discounting; Markov Perfect Equilibria; Environmental Economics and Policy; C61; C73; D63; D99; Q54.
Ano: 2007 URL: http://purl.umn.edu/7181
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Sacrifice, discounting and climate policy: five questions AgEcon
Karp, Larry S..
I provide a selective review of discounting and climate policy. After reviewing evidence on the importance of the discount rate in setting policy, I ask whether standard models tend to exaggerate the sacrifices that the current generation needs to undertake in order to internalize climate damages. I then consider whether the risk of catastrophic damage really overwhelms discounting, in the determination of optimal policy. I revisit the question of how we actually think about the distant future.
Tipo: Working or Discussion Paper Palavras-chave: Climate change; Discounting; Intergenerational conflict; Catastrophic risk; Hyperbolic discounting; Environmental Economics and Policy; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy; C61; C73; D63; D99; Q54.
Ano: 2009 URL: http://purl.umn.edu/51612
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