This paper examines the productivity of Norwegian container seaports and the extent to which the initially less productive seaports are converging/diverging in productivity in relation to the initially more productive seaports. The rationale of the paper is that productivity assessment of Norwegian seaports is scarce in the literature, and studies of convergence/divergence in container seaports are missing in the literature on transportation. The methodology used is the stochastic frontier analysis (SFA)-based Malmquist productivity index ($\mathit{MPI}$) to assess productivity. To infer productivity convergence/divergence over the years, Beta (Β) and Sigma (Γ) types of convergence/divergence are used. The data used are for the 2002–2014 period and include comparable container seaports from the Nordic countries and the UK to increase the discriminatory power in the analyses and to compare the Norwegian container seaports with their peers. The results attest that (i) there has been annual average total productivity improvement across seaports of approximately 9.7%, (ii) the productivity improvement observed has been due to improvement in pure efficiency change of approximately 11% and scale efficiency improvement of approximately 3.2% and a decrease in technical change of approximately 3.2% annually, (iii) Norwegian seaports are also experiencing productivity improvement and are best performers with regard to scale efficiency change, and (iv) there is an indication of convergence among seaports with respect to all productivity indices, suggesting that seaports with initially lower productivity indices progress faster than those with initially higher indices. A major conclusion is that the overall productivity of seaports has improved, and the productivity growth rates have converged.

本文研究了挪威集装箱海港的生产力，以及相对于最初生产力较高的海港而言，最初生产力较低的海港在何种程度上收敛/分化了生产力。本文的基本原理是，挪威海港的生产率评估在文献中很少，而运输性文献中缺少集装箱海港的收敛/发散研究。所使用的方法是基于随机前沿分析（SFA）的Malmquist生产率指数（$\mathit{MPI}$）以评估生产力。为了推断多年来的生产率趋同/差异，使用了Beta（Β）和Sigma（Γ）类型的趋同/差异。所使用的数据是2002-2014年期间的数据，其中包括来自北欧国家和英国的可比较的集装箱海港，以增强分析中的歧视能力，并将挪威的集装箱海港与其他港口进行比较。结果证明（i）整个港口的年平均总生产率提高了约9.7％，（ii）观察到的生产率提高是由于纯效率变化的改进约11％和规模效率的改进约3.2％每年技术变更减少约3.2％，（iii）挪威海港也在改善生产力，并且在规模效率变化方面表现最佳，并且（iv）在所有生产力指数方面都有海港趋同的迹象，这表明最初生产力指数较低的海港发展得更快比起最初具有更高指数的那些。一个主要结论是，海港的整体生产率已经提高，生产率增长率已经趋于一致。