“…An example of a tiered approach in which researchers move from quick initial data analyses to more complex, data demanding, modelling exercises is the fourstep approach used by Van Noordwijk and his team at ICRAF (Meine van Noordwijk, personal communication; see also Tata et al 2014 for the fi rst three steps; Villamor et al 2014 for an agent-based modelling approach). Step one is the collection of system characterization data and the analysis of these data to explore whether trade-offs can be identifi ed, for example between an environmental indicator like soil carbon and the net present value of the land.…”