Long time since I have been on. New forum look is quite nice.

So I have been doing a set of quantile regression models using the QuantReg package. I have two questions in this regard:

1. I have clustered data, is there a pre-existing function to implement block bootstrapping in this regrard. I know the boot package has block bootstrapping for time series but this is not quite what I want.

2. Can you sequence along one of the predictors (in my case school achievement) rather than along the outcome variable (in my case a psychological outcome). If so does anyone know of an R package that does this?