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In platform operations for rental services, product information disclosure (supported by the blockchain technology) is critical to attract customers. We build a stylized duopoly model to analyze the product-information-disclosure Nash game between two rental service platforms whose products-to-rent are substituble. We derive the equilibrium level of product information disclosure and identify conditions under which the platforms choose to disclose or not to disclose information, which correspond to different types of supply chains. For the basic model, we find that there exists a critical threshold on the information-sensitive consumers which helps each platform decide whether or not to disclose product information. If the information auditing cost is sufficiently small, both platforms should disclose the product information as much as possible. For products with higher profit margin, both platforms are more likely to disclose …