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For many products, increases in cumulative production are associated with de- creasing unit costs. However, a serious problem of reverse causality (lower prices leading to increasing demand) makes it difficult to use this relationship for pol- icy. We study World War II, during which the demand...
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Recently it has become clear that many technologies follow a generalized version of Moore's law, i.e. costs tend to drop exponentially, at different rates that depend on the technology. Here we formulate Moore's law as a correlated geometric random walk with drift, and apply it to historical...
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We propose a simple model where the innovation rate of a technological domain depends on the innovation rate of the technological domains it relies on. Using data on US patents from 1836 to 2017, we make out-of-sample predictions and fond that the predictability of innovation rates can be...
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We study a simple model for the evolution of the cost (or more generally the performance) of a technology or production process. The technology can be decomposed into n components, each of which interacts with a cluster of d-1 other, dependent components. Innovation occurs through a series of...
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Reaching net-zero emissions by 2050 requires unprecedented scaling up in the global deployment of critical decarbonization technologies, such as solar photovoltaics, wind turbines, and electric vehicles. This challenge is currently rife with both risks and rewards: while securing an adequate...
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