Proposition 1: if $\partial^2 F(x\mid\rho)/\partial\rho^2 \le 0$, the retailer's rebate profit is concave in $\rho$

Initializing...

Proposition 1: if $\partial^2 F(x\mid\rho)/\partial\rho^2 \le 0$, the retailer's rebate profit is concave in $\rho$ · Prove2Me