I'm not much for overly complicated models since they increase the learning curve manyfold. My suggestion is that when a tech is researched by a nation, that nation does it at full cost. Next nation gets a small discount (at what ever is left of the research cost) and every country after gets a bigger and bigger discount. When a set percentage of all countries have the tech it becomes free. The discount can vary for different techs if it increases realism. Perhaps you would gain VP:s for each tech you are the first to research (as it still gives prestige to this day to have been the first with something like penicillin or aeroplanes).
The problem is that in Victoria the world needs to be divided into different tech-groups and the interlinkage between these can be a little bit complicated.
Hopefully this would be doable (and understandable to new players).
The problem is that in Victoria the world needs to be divided into different tech-groups and the interlinkage between these can be a little bit complicated.
Hopefully this would be doable (and understandable to new players).