Theory-based implementation
    
      - Implementation of Class A as state space model:
        
          - define variables
            
              - z ≡ x, v ≡ i, w ≡ (c, t, d)'
 
            
           
          - define G and H
            
          
 
          - implementation trivial
 
        
       
      - Implementation of Class B as probabilistic state space
        model:
        
          - add two-dimensional random vector ξ = (ξR,
            ξD)
 
          - define G, H and ξ
            
          
 
          - implementation uses Binomial
            block from above