The SIR Model from epidemiology is being discussed a lot recently due to the COVID19 scenario. I recently read this article about the Corona virus and what economics can offer- https://afinetheorem.wordpress.com/2020/03/13/the-simple-economics-of-social-distancing-and-the-coronavirus/
In the beginning itself, it mentions that "the most straightforward epidemiological model of infection – the SIR model dating back to the 1920s – is actually quite commonly used in economic models of innovation or information diffusion, so it is one we are often quite familiar with."
Which economic model or which class of economic models is likely referred to in this line? Where can I read more and learn about these models of information and innovation?