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U.S. wealth concentration, or income inequality, has returned to levels not seen since the 1920s, and it could actually be significantly worse.

Driving the news: New research from Gabriel Zucman, an economics professor at the University of California, Berkeley, for the National Bureau of Economic Research was unearthed recently by MarketWatch and finds that the top 1% owns about 40% of total household wealth. It reaches 40.8% when including the Forbes 400.

Further, the top 1% richest U.S. families own 40 times the average family's wealth.

  • "No country (apart from Russia) for which estimates of wealth inequality are available has similarly high recorded levels of wealth inequality," Zucman writes.

Between the lines: Perhaps the most interesting part of Zucman's research may be his point that the top 1% of American households likely hold much more of the nation's and the world's wealth than anyone realizes.

  • "It is not enough to study wealth concentration using self-reported survey data or tax return data," Zucman says in the report, estimating that 8% of the world’s household financial wealth is held offshore.

"Because the wealthy have access to many opportunities for tax avoidance and tax evasion—and because the available evidence suggests that the tax planning industry has grown since the 1980s as it became globalized—traditional data sources are likely to under-estimate the level and rise of wealth concentration."

Zucman also notes that data shows the share of total wealth owned by the top 1% has increased by 9 points since 1989 and by 10 points when including the Forbes 400. In capitalized income estimates, it has increased by 11 points.

  • "The share of wealth owned by the bottom 90% has collapsed in similar proportions."

Worth mentioning: Zucman is one of the economists behind Elizabeth Warren's wealth tax proposal.

Go deeper

Ben Geman, author of Generate
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Illustration: Aïda Amer/Axios

The ransomware attack against the Colonial Pipeline — the massive East Coast gasoline artery — is a stunning real-world example of the increasing risks that the energy sector faces from a cyberattack.

Why it matters: Different parts of the vast American energy system are vulnerable — from pipelines to power grids to individual power plants and plenty in between.

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Scoop: TikTok launching jobs service for Gen Z

Illustration: Aïda Amer/Axios

TikTok is testing a tool for brands to recruit employees, sources tell Axios.

Details: The pilot program is designed to help people find jobs on TikTok and connect with companies looking to find candidates. It's also meant to help brands use TikTok as a recruitment channel.

Crypto media boom

Data: SimilarWeb; Chart: Axios Visuals

A slew of new crypto media companies have gained enormous traction over the past year, thanks to the digital currency craze taking over Wall Street.

Why it matters: “For the first time ever, crypto has become relevant to the global macro-economic conversation, and therefore, the investment conversation," says Jason Yanowitz, co-founder of Blockworks, a financial media brand catered to investors.