Index of International Openness (IIO)


Conceived in 2001 by Gaetano Ferrieri (Ph.D.), the Index of International Openness (IIO) is a synthetic measure of global integration.


The IIO combines three basic dimensions of this phenomenon:


International Trade in goods


Foreign Direct Investment


International Migration



Each dimension is resumed by a thematic index, calculated through an original, innovative and rigorous methodology.


The Index of international openness (IIO) is a weighted summary of the three thematic indices.





IIO Report

Index of International Openness (IIO)
















Index of International openness (IIO)


IIO Reports




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