In reality, the market for film will show dynamics that are somewhere in-between those of a fixed price monopoly and a quasi-perfect "cost price +" free market dynamic.
Certain brands/manufacturers - usually those with an enviable market positions and a very select dealer network - are able to exert heavy price controls over their distributors and retailers to basically fix street price to MSRP. This prevents 'race to the bottom' discounting, ostensibly to 'protect' brand image but of course maintain everyone's profit margin along the chain.
Kodak kinda fits this description... but also kinda not. Kodak's dominance in film, particularly colour film, is of course massive, especially with Fujifilm basically treading water now and showing little commitment to analogue photography beyond Instax. Fair to say Harmon - as awesome as Phoenix is - won't be a serious Gold competitor, let alone Ektar/Portra challenger - for colour film for another decade at minimum. Lucky will probably get there sooner, but again it's early days for them.
That said, photographic film is fundamentally a mass produced commodity product in a now very niche market. A growing niche market, but one still badly misaligned with Kodak's miles-long high-volume production system. It's in their best interests to grow consumption of film as much as the modern day market can handle... basic logic says that more production, more availability and lower costs will remove one of the main barriers to more people partaking - that being price.
However the prevailing attitude still seems to be to make film precious unobtanium and charge as much as the existing market will bear. Might work in the short term - though Kodak's expenditure to profit ratio is pretty terrible - but long term? Hmmm.