It has been some time since I even thought about work on technology diffusion and competitive responses of firms moving plant and research from the US to the UK that I undertook in the early 1970s.
Some of this has been published and republished and is available for download on the internet.
One of my articles is available as part of a Google book published through the UN Center for the study of activities of transnational corporations, see diffusion of technology or technology. My articles on inward investment to the UK by US companies in the semiconductor and in the pharmaceutical industries is available on the National Bureau of Economic Research NBER site.
I think this type of research is still state-of-the-art encorporating as it does a way to examine competition using a non-linear model of diffusion. The model combines two types of simple averages, those of position and rate of change, with data on number of expected entrants, their size, previous innovational/copy cat history and other characteristics.