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Frank Rowley's avatar

Thank you for that clifton. Whenever I see your Cliff Notes pass my feed I always click on it knowing that you'll cut through the highbrow intellectual nonsense and throw some facts down... To have the notion that one can just jump in the car and move to where the jobs are can only be born of a person that is completely disconnected with the reality of the average man in this country... I find myself reading more books these days then listening to podcast for exactly this reason. There seems to be a giant disconnect between those who breath the rarified intellectual air and the rest of us down here in the factories.

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David Montgomery's avatar

I have spent more decades than I like to record in business and policy consulting, and believe you and I met when Professor Loury and I were relatively young economists at a symposium on natural gas regulation in the 1980s. For my sins in making a career of calculating the impacts of government regulation, I have had to deal with oversimplified multiplier calculations far too often. Regrettably, that is also what I find here. First, Mr. Roscoe’s numbers fail to account for the percentage of the African-American population holding manufacturing jobs before and after deindustrialization. Without that, his contribution might shed light on effects of deindustrialization in general but not its differential effects on any particular group. Second, using multipliers as he does for an economy-wide issue like deindustrialization is a fundamental error. It fails to take into account the fact, pace the first comment, that over time the total workforce does shift from one occupation and industry to another. It is simply false that “indirect” jobs supported by US workers were cut in half or more over the period of deindustrialization, which is what his multiplier stories seem to imply. If every disastrous effect on unemployment forecasted by multiplier analysis since it came in vogue had been accurate, the only people working today would be those doing the studies.

Studies done with valid analytical methods show that deindustrialization could lead to fewer workers being employed, but far less than Mr. Roscoe’s naive multiplier analysis implies. Applying even the simplest of applied general equilibrium models -- which have become the standard in both consulting and government agencies -- to do this analysis also makes it possible to think about how to differentiate impacts on different demographic groups. For a reasonably straightforward explanation of the reason analysts have adopted the general equilibrium approach, I suggest a report done by the Science Advisory Board for the EPA on use of economic models: https://www.epa.gov/system/files/documents/2023-02/EPA-SAB-17-012_1.pdf, to which I confess to being a contributor. See in particular p. 49 which points out the failing of multiplier-type models to take into account overall resource (i.e. labor) supply.

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