“Unintended Consequences is far smarter and more thought-provoking than most economics written for the general public” - Greg Mankiw, Harvard University, Former Chairman of the Council of Economic Advisors
“Unintended Consequences provides a provocative interpretation of the causes of the global financial crisis and the policies needed to return to rapid growth. Whether you agree or not, this analysis is well worth reading.” - Nouriel Roubini, New York University; Chairman, Roubini Global Economics
“…a comprehensive explanation of the modern economy.” - Julian Robertson, Founder, Tiger Management
“…challenges misconceptions that distort our economic debates.” - Arthur Brooks, President of the American Enterprise Institute
“…a fresh argument for the productive value of inequality.” - David Autor, Professor of Economics, Massachusetts Institute of Technology
“…a very valuable contribution.” - Larry Summers, former Secretary of the Treasury and director of the National Economic Council, president emeritus, Harvard University
“…a must-read for serious students of economic policy.” - Glenn Hubbard, Dean, Columbia Business School, and former Chairman of the Council of Economic Advisers
“A full-throated defense of economic dynamism.” - The Wall Street Journal
“Unintended Consequences represents the most cogent and persuasive analysis of the Financial Crisis to date.” - Andrei Shleifer, 1999 John Bates Clark Medal Winner
“…reminds us that inequality sends a signal of what society lacks most, in America’s case, entrepreneurship and risk taking.” - Lawrence Lindsey, CEO, The Lindsey Group, former Director of the National Economic Council
“Unintended Consequences should be read by anyone who takes for granted the superiority of progressive taxation and has not thought carefully about the trade-offs involved.” - The New Republic
“Unintended Consequences is full of substance, it is one of the must-read books of the year, and once I finish it I will be giving it a second read through right away.” - Tyler Cowen, Professor, George Mason University
Ian Smith, Attracta Mooney, and Aime WilliamsFinancial Times
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The CEO of one of the world’s largest reinsurers described rising premiums after four years of $100B losses as a carbon price, “this is the first time we actually bring a climate change bill back to the consumer.”
A run of four consecutive years when overall insurance losses from natural catastrophes have topped $100bn, previously the mark of a remarkably bad year, has spooked executives. In the US, a repricing of risks has sparked a significant rise in premiums. Last year saw a record-breaking number of natural catastrophes causing at least $1bn in insurance losses: 37 separate events, according to data from insurance broker Aon. That included 25 so-called severe convective storms, of which 21 were in the US. The cost of property catastrophe reinsurance cover, which they use to share the burden of natural disaster claims, is at its highest in a generation. If yearly losses stick above the $100bn level, and firms are forced into further price rises and pullbacks to protect their balance sheets, it could “harm the whole proposition of the insurance sector to society”, says one reinsurance chief executive. There will be growing “patches” where buying insurance is uneconomical, Swiss Re has predicted.
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Noting that over the past decade global CO2 emissions projected by the IEA have fallen by more than 40%, Bill Gates argues innovation will likely “give us the tools we need to meet the growing demand for energy without increasing carbon emissions.”
Ten years ago, the International Energy Agency predicted that by 2040, the world would be emitting 50 billion tons of carbon dioxide every year. Now, just a decade later, the IEA’s forecast has dropped to 30 billion, and it’s projecting that 2050 emissions will be even lower. Even if the world takes only moderate action to curb climate change, the current consensus is that by 2100 the Earth’s average temperature will probably be between 2°C and 3°C higher than it was in 1850. That’s well above the 1.5°C goal that countries committed to at the Paris COP in 2015. In fact, between now and 2040, we are going to fall far short of the world’s climate goals. One reason is that the world’s demand for energy is going up—more than doubling by 2050. Although wind and solar have gotten cheaper and better, we don’t yet have all the tools we need to meet the growing demand for energy without increasing carbon emissions. But we will have the tools we need if we focus on innovation. With the right investments and policies in place, over the next ten years we will have new affordable zero-carbon technologies ready to roll out at scale. Add in the impact of the tools we already have, and by the middle of this century emissions will be lower and the gap between poor countries and rich countries will be greatly reduced.
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The world’s ocean temperatures reached the second-highest level on record for May, capping an “alarming” two-year streak of rapid warming. Atmospheric concentrations of CO2 hit their highest seasonal peak since records began, a global mean of 426 ppm.
The world’s ocean temperatures reached the second-highest level on record for May, capping an “alarming” two-year streak of rapid warming and fueling concerns about the seas’ ability to absorb rising levels of carbon dioxide. The EU’s Earth observation service Copernicus said the global average sea surface temperature in May was 20.79C, 0.14C below the record in the same month in 2024. The level of CO₂ in the atmosphere peaked globally at the mean of 426 parts per million in March, up from 423 ppm a year ago, and surpassed 430 ppm at the Mauna Loa Observatory in Hawaii. Scientists estimate the ocean has absorbed between a quarter and about 30% of carbon dioxide released into the atmosphere and about 90% of excess heat, helping to keep temperatures on land cooler. But Michael Meredith, a scientist at the British Antarctic Survey in Cambridge, warned the ocean “may lose some of its capacity to buffer us against the worst extremes of climate change” by absorbing less warmth or carbon than previously. “We’re seeing stronger and stronger bursts of ocean warming — marine heatwaves — that are pushing us past records at an alarming rate.”
Take the Under— .@RogerPielkeJr argues that more realistic projections of global population and GDP growth suggest that “even partial future policy successes could more easily…
China’s cumulative carbon emissions since 1850 have outpaced Europe’s but are still 60% of the US’s level. China has been the world’s #1 carbon emitter since 2006.
The United States has burned more fossil fuels than anywhere else in history. Europe has long ranked No. 2 in total historical greenhouse gas emissions. Until now. And projections show that China may nearly catch up with the United States. Data for carbon dioxide-equivalent emissions from 1850 to 2023 is from Jones et al (2024); data for 2024 from Carbon Brief; projected data for 2025 to 2100 is based on the International Energy Agency’s “stated policies scenario” tracking nations’ climate actions. European Union totals were calculated for the current 27 member countries. Lines show cumulative territorial CO2 emissions from fossil fuels, cement, land use, land use change and forestry.
Take the Under— .@RogerPielkeJr argues that more realistic projections of global population and GDP growth suggest that “even partial future policy successes could more easily…
Limiting global warming to the 2° target might be more affordable than projected due to slower economic growth and the ongoing decline in the cost of solar power, wind power, and lithium batteries as production volumes increase.
Economic modellers also have a poor record of predicting technological advances. They overestimate the take-up of some technologies (such as carbon capture and storage, whereby carbon dioxide is sucked out of the smokestacks of power stations and factories and stashed away safely underground) and severely underestimate the falling costs of others, most notably solar panels and lithium batteries. Rupert Way of the University of Cambridge and others have modelled an energy system in which the cost of solar power, wind power, lithium batteries and hydrogen electrolysers falls according to “Wright’s law”. This holds that every doubling of production sees unit costs fall by a fixed percentage, with that percentage derived from past experience. In this scenario emissions fall so rapidly that even the 1.5°C target can be met at minimal cost.
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.@RogerPielkeJr argues that more realistic projections of global population and GDP growth suggest that “even partial future policy successes could more easily bring into view future emissions consistent with a 2C temperature target.”
Updated understandings of population and GDP suggest that, at a minimum, the “assumption space” used to generate scenarios needs to reorient away from extreme socio-economic assumptions and towards more realistic socio-economic scenarios consistent with observations of the real world. Every time global population GDP projections are revised down, the challenge of climate change appears that much more tractable. Of course, peak population and slower economic growth bring with them considerable societal and policy challenges of their own. “Current policy” projections are based on a very conservative set of assumptions — who thinks there will be no new climate and energy policies? — and many countries have committed to accelerating decarbonization. Conditional on slower-than-projected population and/or GDP growth, that means that even partial future policy successes could more easily bring into view future emissions consistent with a 2C temperature target. Basing our expectations on the latest understandings of population and GDP changes is thus essential for a clear-eyed view of climate and energy challenges.
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The Wealth of Working Nations— Japan achieved GDP growth per working-age adult of 31.9% between 1998 and 2019, slightly faster than the US at 29.5%. @King_ofSweden
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Attracta Mooney, Steven Bernard and Jana TauschinskiFinancial Times
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Oceans have absorbed 90% of the heat from human-caused carbon dioxide emitted during the industrial era, but some scientists are concerned that oceans may be reaching their limits in protecting the planet against the worst extremes of climate change.
Scientists are now trying to understand what has driven the rapid anomalous rise in sea temperatures, why that heat has lingered and whether the world’s seas will cool again. At the heart of these questions is a concern that the oceans may be reaching their limits in the vital role they play in protecting the planet against the worst extremes of climate change. They have absorbed 90% of excess heat and about a quarter of human-caused carbon dioxide emitted during the industrial era. “All that heat that’s going into the ocean is not going into the land surface or into the atmosphere, or into the ice caps,” says Michael Meredith, oceanographer and science leader at the British Antarctic Survey. “The ocean has been doing this huge climate favour for us for decades.” But he adds there is no guarantee it will continue doing so at the same rate. “If this does slow in future, the consequences will be like we saw in 2023 [the hottest year on record] but much more so.”