The economic performance of micro-states and those sub-national regions enjoying a high degree of autonomy is a generally under-researched area. This paper builds on earlier research (Armstrong and Read, 1995) by employing quantitative techniques to test: 1.(a) the extent to which the economic performance of micro-states differs, by comparing their GNP per capita with that of the region in which they are located and with the countries to which they are adjacent;2.(b) whether some micro-states perform better than others as a result of differences in their economic structure; and3.(c) whether the rates of growth of micro-states have been faster or slower than those of larger countries. Considerable diversity among micro-states is revealed, although most exhibit strong economic performance.