The figure is drawn setting |$\bar a = 1;\,\sigma = 1;$|  |$\gamma = 1$|⁠. It shows the change of patronage refunds (⁠|$\beta^{*}\,\left( \alpha \right)\,in\,$|the left panel), the procurement price (⁠|${w^*}\left( \alpha \right)in\,the\,$|middle panel) and the net price received by farmer (⁠|$N{P^*}\left( \alpha \right) = \beta \,w + \left( {1 - \beta } \right)\bar P$| in the right panel), when the relative political power of farmer |$\alpha $| varies from 0 (intermediary dominant) to 2 (farmer dominant).