I doubt this is true but have no evidence on hand right now so won't dwell on that point.
However, the problem with Detroit and the auto industry is that there is no more growth to extract from the auto industry. It's unlikely that the auto industry will ever need more workers in the future than it has today. Each recession is a reason for the industry to become more efficient [[in other words, do more with less). The same has not been true of the tech industry because we're probably still very early in the Information Era, while we passed the high water mark of the Industrial Era some time in the mid-20th century.
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