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The source provides the following information: "Connectivity measures the access available from a country’s major airports to the global air transport network. It is a qualitative measure of a country’s air transport services, from the point of view of its businesses. The higher the level of connectivity the greater the level of access to the global economy. (...) (The source) has developed a connectivity indicator to measure the degree of integration a country has within the global air transport network. It is a measure of the number and economic importance of the destinations served from a country’s major airports, the frequency of service to each destination and the number of onward connections available from each destination. Connectivity increases as the range of destinations increases, the frequency of service increases and/or larger “hub” airport destinations are served."