Maximal matchings
针对政策制定者关注商品或服务可及性的场景，提出一种激励相容的机制，在双边交易市场中实现交易数量最大化，但需外部资金支持。
There are many situations where policymakers are primarily concerned with the availability and accessibility of goods or services. Examples include electricity, food, housing, medical supplies, et cetera . In such cases, the social goal may be to maximize the number of transactions, which we refer to as a maximal matching. This paper presents a mechanism that implements this objective for markets characterized by bilateral transactions. The mechanism is incentive compatible, but, like the VCG-mechanism that yields the total-utility-maximizing outcome, it requires external funding.