As I noted earlier, my headcanon's pretty rough. I haven't tried to work it out with anyone else; in fact, today was my first stab at jotting it down. Basically, it's definitely not up to the standard you and azelmaroark have set.
General District 3 Notions
* District 3 is the most densely populated. As I understand it, D3 is tasked with the design and manufacturing of electronics and other technology for the Capitol and the relatively high-technology districts. Presumably this involves the basic level technology that you'd expect for at least 1, 2, 5, 6, 8 and 9, plus higher-level support for 1 and 5 (which I imagine have special needs based on the relatively higher level of technology that's probably involved in power generation and luxury manufacture--though 5 may do some manufacturing), and of course, the almost-indistinguishable-from-magic level of technology required for the Capitol. While you make some gains from automation, I don't think they're as many as you get in our civilization, because I expect that a larger proportion of the demand is for relatively small batch orders of complex items for Capitol citizens or specific industries, rather than mass-manufacture items (as there are so few in the districts who can afford a lot of technology, and many of the district industries don't require it). So, I think a relatively large (compared to say, D10 or D12) population is required. I expect that the population needs to be fairly close to their places of employment, so I'm picturing a very urbanized environment where most people live within walking/bus distance of their employer, with perhaps some industrial park/storage areas mixed in or at the edges.
* District 3 is almost entirely dependent upon the other districts for their food supply. D3 has technology that can be transformed into weapons and a relatively large population smart enough to pull this off, but rebellion is difficult to sustain because, without green space, they're dependent upon supplies from the food-generating districts. The Capitol has used this vulnerability to maintain control during prior 'backups in production'. Even in relatively good times, a lot of the food in D3 is heavily processed and selected for its shelf-life rather than culinary merits. When Beetee and Wiress first visited the Capitol, they were astonished by the sheer abundance of fresh vegetables, which even as victors they can't always get their hands on in D3.
*District 3 has a class divide between researchers/engineers and factory workers. Technology manufacturing is tedious even in a society with basic labor protections. In the Hunger Games universe, I imagine it's atrocious: long hours, repetitive stress injuries, dank work environments, the potential for industrial accidents. Nothing like as dangerous as life in D12's mines or D2's quarries, but still probably pretty bad. The life of a scientist or engineer is probably greatly preferable--intellectually engaging, safer, and more remunerative. There's probably more mobility between the classes than there is in D12 (intelligence is at least to some degree heritable and so plays a role in who has a better shot of landing a research position, but the process is not so direct as inheriting D12's only bakery from your parents), but I imagine that there's also a lot of assortative mating (both as a natural function of culture and opportunity, and at the encouragement of the District authorities or even the Capitol—still working out what this looks like) that reduces potential social mobility. Related to this point...
District Three Headcanon, Part the First
Date: 2013-07-25 03:09 am (UTC)General District 3 Notions
* District 3 is the most densely populated. As I understand it, D3 is tasked with the design and manufacturing of electronics and other technology for the Capitol and the relatively high-technology districts. Presumably this involves the basic level technology that you'd expect for at least 1, 2, 5, 6, 8 and 9, plus higher-level support for 1 and 5 (which I imagine have special needs based on the relatively higher level of technology that's probably involved in power generation and luxury manufacture--though 5 may do some manufacturing), and of course, the almost-indistinguishable-from-magic level of technology required for the Capitol. While you make some gains from automation, I don't think they're as many as you get in our civilization, because I expect that a larger proportion of the demand is for relatively small batch orders of complex items for Capitol citizens or specific industries, rather than mass-manufacture items (as there are so few in the districts who can afford a lot of technology, and many of the district industries don't require it). So, I think a relatively large (compared to say, D10 or D12) population is required. I expect that the population needs to be fairly close to their places of employment, so I'm picturing a very urbanized environment where most people live within walking/bus distance of their employer, with perhaps some industrial park/storage areas mixed in or at the edges.
* District 3 is almost entirely dependent upon the other districts for their food supply. D3 has technology that can be transformed into weapons and a relatively large population smart enough to pull this off, but rebellion is difficult to sustain because, without green space, they're dependent upon supplies from the food-generating districts. The Capitol has used this vulnerability to maintain control during prior 'backups in production'. Even in relatively good times, a lot of the food in D3 is heavily processed and selected for its shelf-life rather than culinary merits. When Beetee and Wiress first visited the Capitol, they were astonished by the sheer abundance of fresh vegetables, which even as victors they can't always get their hands on in D3.
*District 3 has a class divide between researchers/engineers and factory workers. Technology manufacturing is tedious even in a society with basic labor protections. In the Hunger Games universe, I imagine it's atrocious: long hours, repetitive stress injuries, dank work environments, the potential for industrial accidents. Nothing like as dangerous as life in D12's mines or D2's quarries, but still probably pretty bad. The life of a scientist or engineer is probably greatly preferable--intellectually engaging, safer, and more remunerative. There's probably more mobility between the classes than there is in D12 (intelligence is at least to some degree heritable and so plays a role in who has a better shot of landing a research position, but the process is not so direct as inheriting D12's only bakery from your parents), but I imagine that there's also a lot of assortative mating (both as a natural function of culture and opportunity, and at the encouragement of the District authorities or even the Capitol—still working out what this looks like) that reduces potential social mobility. Related to this point...