Fitting and calibrating a multilevel mixed-effects stem taper model for maritime pine in NW Spain

The corresponding author was in receipt of an FPU grant (AP2012-05337) from the Spanish Ministry of Education, Culture and Sport, http://www.mecd.gob.es/. This work was also supported by project no. AGL2008-02259/FOR from the Spanish Ministry of Science and Innovation, http://www.idi.mineco.gob.es/; and project nos. CN-07-094 and SVPA-13-ECOEMP-58 from the Government of the Principality of Asturias, http://www.asturias.es/