A dynamic model of optimal investment in research and development with international knowledge spillovers

Figures & data

Fig. 1. The vector field of the Hamiltonian system (7), (8) for υ = 4, b = 2, κ = 1, ρ = 0.1, γ = 0.5 (a Maple simulation).

Fig. 2. The vector field of the Hamiltonian system (7) (8) for υ = 4, b = 4, κ = 1, ρ = 0.2, γ = 0.5 (a Maple simulation).

Fig. 3. The vector field of the Hamiltonian system (7) (8) for υ = 2, b = 3, κ = 1, ρ = 0.4, γ = 0.5 (a Maple simulation).