Dambon J, Sigrist F, Furrer R (2019). \texttt{varycoef}: An \textsf{R} package for varying coefficient models. R package version 0.2.9, https://github.com/jakobdambon/varycoef.

Corresponding BibTeX entry:

  @Manual{,
    title = {\texttt{varycoef}: An \textsf{R} package for varying
      coefficient models},
    author = {Jakob Dambon and Fabio Sigrist and Reinhard Furrer},
    year = {2019},
    note = {R package version 0.2.9},
    url = {https://github.com/jakobdambon/varycoef},
  }