Choosing an efficient and flexible contract is crucial in various circumstances. However, most existing studies focus only on defining and comparing various contracts and often overlook the efficiency of information in contract execution. This paper aims to examine the impact of information sharing on supply chain members' behavior and profit under a linear price contract and contract menus. To this end, we use a supply chain model featuring a manufacturer and a retailer to analyze the decision-making process regarding information sharing, considering associated costs. Through a manufacturer-Stackelberg game, we compare the impact of different contract types on member performance and profitability. Our findings indicate that the choice of contract type significantly influences profit distribution within the supply chain and the decision on information sharing. Specifically, the retailer's profit is higher under a linear price contract, while the manufacturer achieves higher profitability with contract menus.
