This is Monash U in Australia and seems pretty explicitly focused on the Australian context. Maybe corn is as subsidized there as it is in the states but a cursory search makes me skeptical. At any rate, this forum does attract a fairly international readership, but if we wanted a US-centric study we could maybe look at the long term outcomes from cities that have levied taxes (nothing state level it seems like), such as this study in Oakland, CA: https://journals.plos.org/plosmedicine/article?id=10.1371/jo...

I suppose we'd see something similar on a broader scale w/ a reduction in subsidies, but in terms of knock on effects and scale they're not _too_ comparable (i.e. SSBs are a single product, corn in general goes into a lot of different products, etc)