April 2026

DP118 The evolving story of sovereignty and economic development in small island economies

Development Policy Centre Discussion Paper 118
by Geoff Bertram
Abstract:

A worldwide statistical pattern observed in small island economies is the tendency for sovereign independent small island developing states (SIDS) to have lower per capita income than non-sovereign Island jurisdictions (SNIJs). This paper reviews the progress of work by small-island researchers to account for this. An initial hypothesis, that causality ran from political status to income, was eventually rejected by the data. An alternative proposition, that income levels determined political status during decolonisation, is not rejected, but would need to be substantiated by in-depth documentation from the record of twentieth-century decolonisation. A third possibility, that political status and modern incomes were jointly determined by some other cause, remains open. Long-run import series of import data from 1900 on indicate that the income divergence between current SIDS and SNIJs took off during the 1920s and 1930s, prior to decolonisation. The reasons remain a subject for historical research.

Suggested citation:

Bertram, G. 2026. The evolving story of sovereignty and economic development in small island economies, Development Policy Centre Discussion Paper 118Crawford School of Public Policy, The Australian National University, Canberra.

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