Models‎ > ‎Simpop2 Generic Model‎ > ‎


1st step - Constitution of the networks of exchange -

For each city, and for each function :
  • Identification of all the cities potentially adequate for an exchange
  • Pre-selection of the cities which have been valuable customers at preceding iteration
  • Random selection among the others in order to complete the network
2nd step - Exchange market -
  • Each city indicates its supply to each potential customer
  • The customer cities receive the supply proposals, possibly from several producing cities
  • A selection is then operated from both sides:
    • A city's supply is distributed proportionally to the weight of the total demand of each city
    • The cities select the supplying ones according to criteria of technicity or low cost (depending on the kind of function).
  • The transfer of wealth associated to each transaction is operated
NB: this procedure operates in parallel for the exchanges associated to all functions

3rd step - Exchange balance -

The exchange balance is computed for each function at the level of each city in terms of:
  • Sold / unsold goods
  • Satisfied / unsatisfied demand
  • Gain / loss of wealth
4th step - Evaluation of change -
  • In terms of population growth
  • in terms of the sectoral distribution of the labour force
Details for the specialised functions
Details of the cycle of allocation of demands and supplies
mathematical formalisation of the exchange market rules