Here are a couple more citations that have more data behind them, if somebody wants to dig into it (and has the journal access):

* https://www.sciencedirect.com/science/article/pii/S030881469... * https://link.springer.com/chapter/10.1007/978-1-4615-5975-7_... * https://onlinelibrary.wiley.com/doi/abs/10.1002/jsfa.2825