You should read up on it. Talk to some of the incredibly bitter ex-Kodak people. Here's a timeline.
1975, Kodak invents digital photography. Management does not see value in developing it to the point where it can be sold to consumers. (Why should they, film is doing multiple billions of business per year!) Patents are filed.
1980s: People decide to give digital a try. Kodak decides film is still better and pursues the medical diagnostic film market. Fujifilm eats away at their domestic consumer film sales. Kodak tries to enter the battery market and gets properly served by Duracell.
1990: Kodak introduces Photo CD because they just don't 'get it' that it's a huge waste of money when you can just exchange photographs in GIF or JPEG format. It's not very successful, and R&D costs are high.
1991, Kodak releases a 1.3 megapixel digital camera. It's not very good.
Mid 1990s: Various sub-par digital cameras are made while the bulk of their focus is still on film and paper. The film business is really, really good. New film products continue to be developed and introduced to the market.
Late 1990s: Kodak introduces APS, trying to divert consumer attention from the growing digital 'fad'.
2001: Kodak unveils the Easyshare system, which is years behind upon release. The gallery website you're supposed to use is terrible, the product is the epitome of crashy TWAIN junk. Image quality isn't comparable to film. Around this time, they have a series of market-dominating digital cameras, but that's not because they're good - that's because they're selling it so cheaply that they are taking a loss on every unit sold in the hopes that their consumables (Kodak photo paper and inks and Photo CDs and website products) will make up the difference. Maybe they're hoping enough people will have a bad experience that digital gets written off as a bad idea?
Mid 2000s: Nikon and Canon eat their lunch in digital cameras because they (and Sony, and Sigma, and Pentax, and Olympus, etc etc) saw fit to pour huge R&D into digital camera development, while Kodak was going strong after film, which made them a lot of money at the time. Epson, HP and Canon also destroy them in the inkjet printing space while Kodak attempts to enter the market with a small thermal printer, which fails because it can't compete on price and also can't be used to print the kids' homework. Profits fall because digital starts a major takeover once it reaches 3 megapixel resolution, which is about the minimum you need for a 4x6 or 5x7, and they aren't ready with good products in the consumer space. Proprietary interconnects and dodgy online galleries aren't helping. Stocks plummet. It gets so bad they are removed from Dow Jones. The death spiral begins. Shedding employees neuters digital R&D and puts them even further behind, which accelerates their decline.
Late 2000s: Cell phone companies, particularly Nokia and Apple, are now the biggest digital camera manufacturers in the world. They do it without Kodak's products. Kodak is a distant single-digit percentage of the market. They resort to lawsuits to try to sustain the business, which is barely surviving on medical imaging and cinema film at this point.
Early 2010s: After filing for bankruptcy, they have sold large portions of their patent portfolio. They have closed or sold many parts of the business. Film and paper are sold. Online galleries are sold to Shutterfly. Pension plans are outright cancelled, leaving many retirees without any options.