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There is significant academic evidence that growth in one country has a positive impact on growth in neighbouring countries. This paper contributes to this literature by analysing the heterogeneous strength of growth spillovers across world regions and by investigating the contribution of transport and communication infrastructure to explain this heterogeneity and promote neighbourhood effects. By defining neighbourhood on the basis of membership of regional trade agreements, we focus on spillovers that work through regional integration and trade. The analysis finds significant evidence for heterogeneity in growth spillovers, which are strong between OECD countries and essentially absent in sub-Saharan Africa (SSA). We further find strong interaction between infrastructure and being a landlocked country. This suggests that growth spillovers from regional 'success stories' in SSA and other lagging world regions will depend on first strengthening the channels through which such spillovers can spread - most importantly connective infrastructure such as transport and telecommunication links. [ABSTRACT FROM AUTHOR]