Now one summable variable (GDP) has been replaced by another (Pop), and there is a new ratio variable (GDPperCap).
However, only changes in GDP per capita need to be specified in this script: that is, only a growth rate needs to be entered:
base year 2002
scenario year 2012
summvar Emissions
ratio EmissionIntensity, GDPperCap
Emissions.by = 100
EmissionIntensity = incr[-18%]
GDPperCap = growth(<2.0%>)
:: Pop >> GDPperCap * EmissionIntensity -> Emissions
Here, the growth rate of GDPperCap is given as an annual growth rate of 2.0%.
This is a key input into the script, so it is blocked out using angle brackets. (This is optional.)
