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These slides use supply and demand curves and other theories to analyze when new technologies become economically feasible. Changes in the supply and to a lesser extent the demand curve gradually enable new technologies to exceed minimum levels of performance and fall below maximum levels of price. The chances of this occurring in the near future depend on the extent of improvements necessary and the rates of improvements. Rapid rates of improvement, which some technologies exhibit, enable new technologies to more quickly become economically feasible. We can use rates of improvement and the minimum thresholds of performance and maximum thresholds of price to estimate when new technologies become economically feasible. This is facilitated by the rather straight lines that performance vs. time curves exhibit, the important effect of R&D on cost and performance (more important than production), and other "realities" that this paper presents.