This paper summarizes the methodological approach designed, used, and validated by
CATIE and its partners in several local initiatives where some potential for this type of
instrument was identified (Campos et al. 2005). It relies heavily on lessons learned from a case
study in Copán, Honduras, in which a payment scheme for HES is currently ongoing (Cisneros et
al. 2007; Retamal et al. 2007, Madrigal and Alpízar 2007)