For many years, the economic rules were supported by both common sense and the data: when unemployment falls, wages rise soon after. But since the turn of the century and before, that relationship has broken down across the developed world, according to data from the OECD (scroll over the chart below for detail).

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Data: Unemployment and annual wage data from the OECD; Chart: Lazaro Gamio / Axios

Stagnant wages aren't just an American problem: Workers in the wealthier nations are facing similar headwinds, like declining union membership, increased competition from foreign workers in a global marketplace, and slow productivity growth. But no one knows precisely why economics are failing to observe the traditional supply-and-demand rules.

The question is not academic: Frustrated by stagnant income, fears for their children's future, and the deterioration of their towns and cities, ordinary people in the U.S. and across Europe are taking it out on migrants and their traditional politicians, shaking up the western-led political system.

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Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 9:45 p.m. ET: 19,282,972 — Total deaths: 718,851 — Total recoveries — 11,671,491Map.
  2. U.S.: Total confirmed cases as of 9:45 p.m. ET: 4,937,441 — Total deaths: 161,248 — Total recoveries: 1,623,870 — Total tests: 60,415,558Map.
  3. Politics: Trump says he's prepared to sign executive orders on coronavirus aid.
  4. Education: Cuomo says all New York schools can reopen for in-person learning.
  5. Public health: Surgeon general urges flu shots to prevent "double whammy" with coronavirus — Massachusetts pauses reopening after uptick in coronavirus cases.
  6. World: Africa records over 1 million coronavirus cases — Gates Foundation puts $150 million behind coronavirus vaccine production.

Warren and Clinton to speak on same night of Democratic convention

(Photos: Abdulhamid Hosbas/Anadolu Agency via Getty Images, Sean Rayford/Getty Images)

Sen. Elizabeth Warren and Hillary Clinton both are slated to speak on the Wednesday of the Democratic convention — Aug. 19 — four sources familiar with the planning told Axios.

Why it matters: That's the same night Joe Biden's running mate (to be revealed next week) will address the nation. Clinton and Warren represent two of the most influential wise-women of Democratic politics with the potential to turn out millions of establishment and progressive voters in November.

Trump considering order on pre-existing condition protections, which already exist

Photo: Jim Watson/AFP via Getty Images

President Trump announced on Friday he will pursue an executive order requiring insurance companies to cover pre-existing conditions, something that is already law.

Why it matters: The Affordable Care Act already requires insurers to cover pre-existing conditions. The Trump administration is currently arguing in a case before the Supreme Court to strike down that very law — including its pre-existing condition protections.