Table 1 The payment matrix for the cooperative game among inventors.

Inventor 1

Cooperative R&D

(P₁^*π–C₁^se–C₁^ab), (P₂^*π–C₂^se–C₂^ab)

(P₁π₁–C₁^se), P₂π₂

Independent R&D

P₁π₁, (P₂π₂– C₂^se)

P₁π₁, P₂π₂