mohammadali eghbali

In recent years, manufacturers have started selling their products online. This study examines pricing in a supply chain involving manufacturing, retailers, logistics service providers, and integrators. There are three products in this chain: two physical products from manufacturers and a service product from logistics providers. Physical products are sold online and in retail stores, with online purchases including two products. The problem is examined in four scenarios, including decentralized, manufacturer integration with retailer, functional logistics service provider integration with logistics service integrator, and a combined approach of manufacturer integration with retailer and functional logistics service provider integration with logistics service integrator. This paper introduces a novel approach by analyzing the impact of logistics supply chain members, focusing on logistics service levels and pricing. The study aims to explore how the integration of supply chain members influences the profits and service levels of other stakeholders. The results indicate that integrating two supply chain members typically lowers profits for other members. Integrating a logistics service provider and integrator can increase manufacturer profit and decrease retailer profit in certain cases, while in other cases profits remain unchanged. Similarly, integrating manufacturer and retailer usually results in decreased profits for logistics service providers and integrators. The integration of functional logistics service provider and logistics service integrator has an impact on the relationship of parameters with service level. In the decentralized scenario, if service price and service coefficients increase, service levels increase. It also increases service levels as the cost of service increases.

Governments today are increasingly focused on managing environmental and economic challenges to safeguard the environment. Consequently, companies are striving to remain competitive in society. This paper introduces a revenue-sharing agreement between the retailer and the manufacturer. The contract is designed to alleviate the research and development costs incurred by the manufacturer in greening their products. Additionally, the paper incorporates consumer surplus as a consideration for the social dimension, which is a key pillar of sustainability.

Government interventions in this paper are modeled as subsidies that influence the final price of the product. Notably, this study, for the first time, integrates all three dimensions of sustainability—social, economic, and environmental—within a game-theoretic framework that includes government intervention and a revenue-sharing agreement between the retailer and the manufacturer.

The modeling results demonstrated that incorporating consumer surplus enhances the profitability of both the government and the manufacturer. Although consumer surplus reduces wholesale prices and revenue-sharing proportions, it leads to increased product sales. This boosts the benefits for consumers and members of the supply chain, contributing to improved greenness and higher levels of product sustainability. Consumers show a preference for purchasing products with greater environmental benefits; however, higher levels of greenness require increased production costs. Manufacturers can boost their sales through research and development efforts and by raising public awareness about green products. As a result, manufacturers, retailers, and the government adjust prices and subsidies to maximize their respective profits, altering the overall profitability of the supply chain. The findings highlight that social welfare is a crucial consideration in supply chains, as it significantly enhances the profitability of chain members and promotes higher levels of green production.

Originality/Value: 

This paper is the first to examine all dimensions of sustainability—social, economic, and environmental—within a theoretical framework that incorporates government intervention and the impact of consumer surplus on pricing policies and the greening of products. The scientific contribution of this research lies in providing new insights to managers and policymakers to enhance strategic decision-making aimed at improving sustainability and social welfare within green supply chains.

Accidents and natural disasters and crises coming out of them indicate the importance of an integrated planning to reduce their effected. Therefore, disaster relief logistics is one of the main activities in disaster management. In this paper, we study the response phase of the disaster management cycle and a bi-objective model has been developed for relief chain logistic in uncertainty condition including uncertainty in traveling time an also amount of demand in damaged areas. The proposed mathematical model has two objective functions. The first one is to minimize the sum of arrival times to damaged area multiplying by amount of demand and the second objective function is to maximize the minimum ratio of satisfied demands in total period in order to fairness in the distribution of goods. In the proposed model, the problem has been considered periodically and in order to solve the mathematical model, Global Criterion method has been used and a case study has been done at South Khorasan.