I don't understand what you mean by "So there is no need to export the function outside the bife package." I cannot access the function even when I load the package, the image was taken after the package had been loaded too. (Thanks for the triple colon information). Also, predict.bife was an example, as you can see from the right-hand side of the screenshot, the majority of the functions listed are not available. So if I run predict.bife(LogitFE, type = "response") without bife::: preceding it, I get Error in predict.bife(LogitFE, type = "response") : could not find function "predict.bife" but same goes for bife:::fitted.bife(LogitFE) vs fitted.bife(LogitFE), etc.