Reverse Revenue Sharing Contract versus Two-Part Tariff Contract under a Closed-Loop Supply Chain System

Table 2

Different optimal choices of under different conditions in model 3.

Scenarios
)	1-1 positive	1-1-1 positive	0
	1-2 negative	1-2-1 positive	1
		1-2-2 negative	“√”
()	2-1 negative	2-1-1 Positive	“√”
		2-1-2 negative	1

.
“√” means there is an optimal value of for the manufacturer: .