Appendix A. Anthropogenic nitrogen deposition predicts local grassland primary production worldwide: Description of hierarchical modeling process. J. StevensCarly M. LindEric HautierYann Stanley HarpoleW. T. BorerElizabeth HobbieSarah W. SeabloomEric LadwigLaura D. BakkerJonathan ChuChengjin CollinsScott F. DaviesKendi FirnJennifer HillebrandHelmut La PierreKimberly J. MacDougallAndrew MelbourneBrett L. McCulleyRebecca MorganJohn L. OrrockJohn M. ProberSuzanne C. RischAnita SchuetzMartin WraggPeter D. 2016 Anthropogenic nitrogen deposition predicts local grassland primary production worldwide: Description of hierarchical modeling process.