Denarius

A JavaScript agent-based economic simulation.

Simulation

• A Market has a fixed number of Traders
• Traders have Jobs
• Traders have money (and start with an initial amount)
• Traders have Goods (called Inventory)
• Jobs are functions over Inventory: they add and subtract Goods
• A Market has buy and sell Orders created by Traders
• A Order can be accepted or denied (which means it didn't go through)
• Agents have a price belief reinforced by the their accepted Orders
  • price belief is a range of two prices where the price can be anywhere between

Each round the following happens:

For each Market:
  For each Trader:
    Work: perform job to get new resources (and consume existing resources)
    Trade: create new buy orders to get required goods
           create new sell orders to get rid of produced goods
  For each trade:
    sort buy orders from highest to lowest price
    sort sell orders from lowest to highest price
    match buy_orders[0] with sell_orders[0] until one list is empty
    throw out (deny) all other orders

  For each Trader that traded this round:
    update price belief for all goods traded
      - if trader successfully traded this good: narrow price belief around that price
      - if trader failed to trade this good: expand price belief towards average price

  For all agents without funds:
    check for new jobs
    reset money

Running

1. Run yarn install to install dependencies
2. Run npm build to build or npm start to run the development server.
3. Visit localhost:8080 to see the simulation

References

• BaazarBot is an excellent economic simulator project and is the key inspiration for this project