A Plan for Private Jet Taxes Would Fund Climate Measures

A small group of countries is aiming to impose a fee on private jets and premium commercial fares. The revenue would help nations adapt to warming.

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Jeff Bezos’ Big Bet on A.I. Is Project Prometheus

The Amazon founder is tapping his fortune to help fund Project Prometheus, an artificial intelligence start-up, even as he has said A.I. may be in a bubble.

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Private Aviation Has Boomed During the Government Shutdown

As the government’s closure drags on, commercial airline passengers are suffering. But private aviation is doing banner business.

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Warren Buffett’s Berkshire Hathaway Farewell: ‘I’m Going Quiet’

In one of his final missives as the company’s leader, Mr. Buffett said he would accelerate his plans to disburse his fortune to his children’s foundations.

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How the Trump Administration Is Giving Even More Tax Breaks to the Wealthy

The Treasury Department and Internal Revenue Service are issuing rules that provide hundreds of billions of dollars in tax relief to big companies and the ultrarich.

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Inside China’s Quest to Defy Aging with Longevity Labs and ‘Immortality Islands’

Longevity labs, “immortality islands” and grapeseed pills are part of China’s national project to conquer aging, despite sometimes shaky science and extravagant claims.

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The $1 Trillion Question Hanging Over Elon Musk’s Pay Package

Tesla shareholders approved his potentially record-breaking compensation package. But will he actually get the full award?

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Mamdani Wants to Tax the Rich. Can He Persuade State Leaders?

After an impressive victory, Mayor-elect Zohran Mamdani now must find funds for his programs. His push for higher taxes puts Gov. Kathy Hochul, who faces a re-election fight, in a tough spot.

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Elon Musk Wins $1 Trillion Tesla Pay Package

Shareholders approved a plan to grant Mr. Musk shares worth nearly $1 trillion if he meets ambitious goals, including vastly expanding the company’s stock market valuation.

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Would Elon Musk Work Harder for $1 Trillion Than $1 Billion?

Economists and psychologists say that compensation may not provide as powerful an incentive as is often assumed.

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