Study on Trade Effects of Green Maritime Transport Efficiency: An Empirical Test for China Based on Trade Decision Model

As the natural environment continues to deteriorate, countries have begun to shift their emphasis to sustainable development, and the study of green shipping—as the main realization of international trade—is an important prerequisite for global sustainable trade. This paper measures the green maritime transport efficiency considering greenhouse gas emissions using the Super-slacks-based measurement (Super-SBM) method, then extrapolates the theoretical model of trade decision covering maritime transport efficiency and maritime transport distance based on the transcendental logarithmic utility function. A panel econometric model based on this theoretical model was constructed, and then the trade effects of green maritime transport efficiency and its transmission mechanism were studied empirically based on the data of 60 sample countries (regions) in five continents from the years 2010 to 2020. The study shows that green maritime transport efficiency significantly promotes China’s foreign trade through three channels: promoting technological progress, reducing trade costs and curbing environmental deterioration. Additionally, this effect tends to be stronger for countries that are IMO members and have higher incomes. This article’s research helps to provide new empirical evidence to explain the growth of international trade.