Figure 1.
Outline of the proposed model. When ρi,k(t) exceeds the integral multiple of ρth, job type k is added to the bottom of the target list of agent i. Agent i visits the home of the nearest agent among the agents whose job type corresponds to the top of the target list. When the agent reaches the home, the agent pays a unit amount of money to buy goods. Then because the demand of agent i is satisfied, ρi,k decreases by ρth. The top item in the target list is removed, and the other items in the target list move up. Then, agent i visits the next target. When there are no items in the target list, agent i returns home and remains there. (Online version in colour.)