Input-based payments
Definition
Payments that are made based on actions which are assumed to produce emissions reductions or removals increases, but where the outcome cannot be measured directly (or is very costly to measure). Input-based payment schemes are often referred to as policies and measures (PAMs).
Source
Glossary. "Realizing REDD+ National Strategy and Policy Option"KE Brandon, M Wells-A. Angelsen (Ed.), 2008
Alternative definition
Refers to payments which are made on the basis of actions with outcomes that are not possible to measure directly (or are very costly to measure), but which are assumed to produce emissions reductions.
Alternative source