An important relationship in cargo handling at cargo ports is the shipper economic demand function for cargo port services, which relates the demand for cargo port services to the prices charged by cargo ports and the cargo demand from shippers at other cargo ports. To our knowledge, such a function has heretofore not been rigorously derived in the maritime economics literature. This note derives a shipper economic demand function for cargo port services to be provided for shipper cargoes while in a cargo port. Using the demand function, it is shown how the price elasticity of demand for port services by users of port services can be derived.

中文翻译：

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货运港口服务的托运人经济需求函数：注解

货港货物装卸的一个重要关系是托运人对货港服务的经济需求函数，它将货港服务需求与货港收取的价格以及其他货港托运人的货物需求联系起来。据我们所知，迄今为止，这种功能尚未在海洋经济学文献中得到严格推导。本说明推导出货运港口服务的托运人经济需求函数，该服务将在货运港口为托运人货物提供。使用需求函数，显示了如何推导出港口服务用户对港口服务需求的价格弹性。