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I don't have the data, but I think a good case study is the company MITRE.

Originally it was engineers from the top down, but over the last 15-20 years those leaders with engineering backgrounds have retired and been replaced by non-engineer MBA's. And the more I look around, the more I see that as a common trope is the US.

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If this has been true, perhaps at some point the pendulum will swing back the other way. BTW the current CEO of Boeing is a mechanical engineer.

https://www.boeing.com/company/bios/kelly-ortberg

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After decades of infamous quality drops that have impacted their reputation and finally bottom line under non technical CEOs.
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