In this paper we construct a composite index that measures insularity for countries that are islands and for those that have islands. By collecting available physical data for all islands in the world, be they states or regions, we provide a novel data set of insularity along different dimensions. Three of these contribute to making insularity more or less severe: the degree of land dispersion, the remoteness and the average size of the island. We aggregate this information, weighting it by the share of insular land at the country level, and compute a measure of insularity that ranges between 0 and 100. We find that the greater burden linked to insularity is borne by islands with no territorial sovereignty.

中文翻译：

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衡量与世隔绝的自然状态

在本文中，我们构造一个综合指数的措施与外界隔绝了各国的岛屿和对那些有岛屿。通过收集世界上所有岛屿（无论是州还是地区）的可用物理数据，我们提供了不同维度的新岛国数据集。其中三个因素或多或少地导致了与世隔绝的严重程度：土地分散的程度、岛屿的偏远和平均大小。我们汇总了这些信息，通过国家级岛屿土地的份额对其进行加权，并计算了一个范围在 0 到 100 之间的岛屿化程度。我们发现与岛屿化相关的更大负担由没有领土主权的岛屿承担。