Should I use another commodity that saw reduced demand, which caused the supply to dwindle? Asbesthos? Does that work? Maybe cigarrettes?
What kind of proof do you want and I’ll go find it for you how’s that.
https://ourworldindata.org/grapher/tobacco-production?tab=chart&country=~OWID_WRL
edit: i don’t know how you can quantify the demand for tobacco, and i don’t know what causal mechanism can explain this chart.
what you’re presenting is a classic post hoc ergo propter hoc. both of those declined in production following the introduction of color television as well. we can’t very well say that color caused a reduced production. in fact, you haven’t actually presented any evidence that less asbethos or cigarettes are being produced.
it appears that the plan of creating government regulation is effective at stopping production, and no causal link to demand is outlined in your hastily-googled abstract.
