Table 1 Conditions for symmetric interior equilibrium

Stability

$\gamma <min\left\{\frac{\left(\beta +1\right)\left(s+2\right)}{1+s},\frac{\left(\beta +1\right)\left(s-2\right)}{s-1}\right\}$

$\gamma <min\left\{\frac{\left(\beta +1\right)\left(s+2\right)}{1+s},\frac{\left(\beta +1\right)\left(s-2\right)}{s-1}\right\}$

None

Concavity

γ < 2(β + 1)

γ < 2(β + 1)

γ < 2(β + 1)