Economists have often viewed the adoption of artificial intelligence (AI) as a standard process innovation where we expect that efficiency will drive adoption in competitive markets. This paper models AI based on recent advances in machine learning that allow firms to engage in better...

We analyze the Bitcoin protocol for electronic peer-to-peer payments and the operations that support the "blockchain" that underpins it. It is shown that the protocol maps formally into a dynamic game that is an extension of standard models of R&D racing. The model provides a technical...