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agriLOWE

This repository contains all the features and instructions necessary to reproduce the agriLOWE ABM model. The model encompasses a spatial-based economy with an ecology of N farmers and 3 different types of land. Technological progress as well as shocks deriving from the interactions with the climate are modelled.

The simulation aims at addressing these two open issues: is it possible to assess the climate change impacts to the agricultural sector in different technologically – developed countries, utilizing a global model? Further, is low technological change in the agricultural sector a bottleneck for development and climate change mitigation?

Image AgriLOWE

Model's main components

  1. Ecology of N farmers (no exit & no entry);
  2. 3 types of land: forestry, low-yield land (characterized by low fertility and intrinsic low productivity of the land) and high-yield land (where the fertility of the ground and the related productivity are instead higher);
  3. Production = min {alphaL, gammaS, thetaK} with
    • alpha: productivity of labour embodied in the machines;
    • gamma: productivity of land;
    • theta: productivity of capital;
  4. Each farmer produce an homogenous bundle of food and the market is perfectly competitive;
  5. Demand is increasing at a fix rate over time: D=D(t-)(1+*d*)
  6. Labour force is equally distributed among cells : l(t)=L/(xy-f) with f forestry cells
  7. Cost structure is marginalist: C(it)= w/alpha + p_land/gamma
  8. Technological progress depends on R&D internal and R&D external
  9. Profit = ((p_food - UC(it))sales(it))) - R&Dint - R&Dext

Climate Interactions

  1. Damage function: Nordhaus (2017, Weitzman (2009)
  2. Carbon uptake: Sterman et al. (2012) and IIASA's Global Biosphere Management Model (GLOBIOM)

Model's Feature

Code Language : R, C++ (under development)

Compile : R no need, C++ uses CMake

Inputs: 21 + a spatial matrix

Outputs: 14 time series of interest

Code structure

  1. Data: import parameter set;
  2. Declare
  3. Initialize
  4. while t<T do:
    • New machines are produced
    • Receive food demand
    • Order new machineries
    • Perform internal R&D
    • Produce
    • Sell and compute profits
    • Obtain new machinery

end

Requirements

agriLOWE has no system specific requirements. It is designed to minimize the level of constraints.