On the basis of current climate policy commitments and potential technology and market responses, my current best estimate for global warming is that average global temperatures by 2100 will rise to no more than 2.5 degrees Celsius above pre-industrial levels.
Responses
Responses weighted by each expert's confidence
Participant | University | Vote | Confidence | Bio/Vote History |
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Franklin Allen |
Imperial College London | Bio/Vote History | ||
It’s very difficult to make these long term predictions. However, I am more optmistic now than I used to be that this climate target may be met, given the great technological progress being made, particularly in solar cells.
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Pol Antras |
Harvard | Bio/Vote History | ||
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Olivier Blanchard |
Peterson Institute | Bio/Vote History | ||
I do not know enough even to have a guess. Technological progress is surprisingly fast. But political support and funding is, as would be expected, not sufficient. Which of these two forces will dominate, I just do not know.
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Richard William Blundell |
University College London | Did Not Answer | Bio/Vote History | |
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Maristella Botticini |
Bocconi | Bio/Vote History | ||
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Agnès Bénassy-Quéré |
Paris School of Economics | Bio/Vote History | ||
+2.3°C according to NDC scenario of the NGFS Phase V, see p. 11 of link. Implementation is however highly uncertain.
-see background information here |
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Elena Carletti |
Bocconi | Did Not Answer | Bio/Vote History | |
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Jean-Pierre Danthine |
Paris School of Economics | Bio/Vote History | ||
We are not on the right track but forthcoming catastrophies will force the global community to act!
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Paul De Grauwe |
LSE | Bio/Vote History | ||
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Jan Eeckhout |
UPF Barcelona | Bio/Vote History | ||
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Xavier Freixas |
Barcelona GSE | Did Not Answer | Bio/Vote History | |
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Nicola Fuchs-Schündeln |
Goethe-Universität Frankfurt | Bio/Vote History | ||
It is very hard to predict the technological progress in this area, e.g. regarding carbon dioxide removal.
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Jordi Galí |
Barcelona GSE | Bio/Vote History | ||
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Luis Garicano |
LSE | Did Not Answer | Bio/Vote History | |
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Yuriy Gorodnichenko |
Berkeley | Bio/Vote History | ||
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Rachel Griffith |
University of Manchester | Bio/Vote History | ||
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Veronica Guerrieri |
Chicago Booth | Bio/Vote History | ||
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Luigi Guiso |
Einaudi Institute for Economics and Finance | Bio/Vote History | ||
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Sergei Guriev |
Sciences Po | Bio/Vote History | ||
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Patrick Honohan |
Trinity College Dublin | Bio/Vote History | ||
I’m optimistic on technology, and especially that a cascading adoption of significantly less carbon-intensive processes within the next few decades is plausible. Much uncertainty though, especially on the political dimension.
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Beata Javorcik |
University of Oxford | Bio/Vote History | ||
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Jan Pieter Krahnen |
Goethe University Frankfurt | Bio/Vote History | ||
The mood in many countries shifts away from giving climate concern high priority in policy agendas. On the other hand, climate sensitive investment strategies are increasingly popular among private agents. Taken together, necessary action happens, although speed is limited.
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Botond Kőszegi |
Central European University | Bio/Vote History | ||
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Eliana La Ferrara |
Harvard Kennedy | Bio/Vote History | ||
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Christian Leuz |
Chicago Booth | Bio/Vote History | ||
Obviously estimate w/huge std error that requires reliance on climate science. My understanding (see link) is that much depends on whether ctries live up to pledges & NDCs (=2.1 C) or continue w/current policies & actions (=2.7 C). Also hope that Amara's Law is at play for tech
-see background information here |
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Thierry Mayer |
Sciences-Po | Bio/Vote History | ||
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Costas Meghir |
Yale | Did Not Answer | Bio/Vote History | |
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Marco Pagano |
Università di Napoli Federico II | Bio/Vote History | ||
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Lubos Pastor |
Chicago Booth | Bio/Vote History | ||
This is quite uncertain, but we are already almost 1.5 degrees above those levels. Given how long carbon persists in the atmosphere, and continued population growth in countries that cannot afford clean energy, it will take time for temperature to change its course.
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Richard Portes |
London Business School | Bio/Vote History | ||
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Canice Prendergast |
Chicago Booth | Bio/Vote History | ||
I'm uncertain as my best guess is just about 2.5 degrees, and it'll likely be close one side or the other.
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Carol Propper |
Imperial College London | Bio/Vote History | ||
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Imran Rasul |
University College London | Bio/Vote History | ||
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Lucrezia Reichlin |
London Business School | Bio/Vote History | ||
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Ricardo Reis |
London School of Economics | Bio/Vote History | ||
From IPCC latest report:"The best estimates [and very likely ranges] for the different scenarios are: 1.4 [1.0 to 1.8 ]°C (SSP1-1.9); 1.8 [1.3 to 2.4]°C (SSP1-2.6); 2.7 [2.1 to 3.5]°C (SSP2-4.5); 3.6 [2.8 to 4.6]°C (SSP3-7.0); and 4.4 [3.3 to 5.7 ]°C (SSP5-8.5)." Very uncertain.
-see background information here |
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Rafael Repullo |
CEMFI | Bio/Vote History | ||
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Hélène Rey |
London Business School | Bio/Vote History | ||
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Antoinette Schoar |
MIT | Bio/Vote History | ||
I believe the only hope for reducing/mitigating climate change is technological progress; societies seem unwilling to make drastic life style changes to reduce climate change. So the pace of warming depends on how quickly new technologies come online and how they are deployed.
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Kjetil Storesletten |
University of Minnesota | Bio/Vote History | ||
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Daniel Sturm |
London School of Economics | Bio/Vote History | ||
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Silvana Tenreyro |
LSE | Bio/Vote History | ||
Governments' commitment to fight climate change has waned in the past few years; unless they reverse course and efforts (and technologies) improve dramatically, we may drift away from the benign scenarios
-see background information here |
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Rick Van der Ploeg |
Oxford | Bio/Vote History | ||
I think it will go higher due to total lack of climate action
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John Vickers |
Oxford | Bio/Vote History | ||
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Hans-Joachim Voth |
University of Zurich | Bio/Vote History | ||
predicting this far out is an exercise in futility; the data behind the CO2 hypothesis are all ill-fitting time series e-metrics and frankly insane models that no serious economist should put their faith in.
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Karl Whelan |
University College Dublin | Bio/Vote History | ||
This is not at all my area of expertise but I understand the Paris agreement's goal of limiting warming to 2c is not likely to be achieved so I'm not sure why we would be confident that warming would be limited to 2.5c.
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Charles Wyplosz |
The Graduate Institute Geneva | Bio/Vote History | ||
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