Yes, the authors are short Tesla, but they disclose it. Yes, the analysis is naive, but that doesn't necessarily mean its conclusions are off. Yes, the inclusion of data from China is... questionable, but the authors address it upfront: "To have the largest sample size and best confidence intervals possible, we also included international accidents (three total, from Canada, Holland, and China). Given the higher incidence of fatal accidents per vehicle-year in China compared to the United States, and the lower incidence of fatal accidents in Holland and Canada, these three deaths should adjust to 3.63 deaths. However, for the sake of conservatism and to avoid a large debate about a rather small difference, we use 3.00 deaths in our analysis."