Political instability, investment and economic growth in Sub-Saharan Africa

This paper explores the relationship between political instabilityand economic growth in Sub-Saharan African nations. A more comprehensivemeasure of political instability than has previously been developedis used in combination with a simultaneous equations model anddynamic panel estimation approach to produce several interestinginferences. First, the statistically significant inverse relationshipbetween political instability and economic growth identifiedby earlier studies is confirmed by the estimates presented here.Second, the estimated system of equations indicates that economicgrowth and political instability are jointly endogenous. Third,in addition to the direct impact that political instabilityhas upon growth, estimates confirm the hypothesis that politicalinstability indirectly decreases economic growth by decreasinglong-run capital accumulation. Fourth, failure to account forthe dynamic nature of growth equations as well as the endogeneityof explanatory variables may produce biased effects of politicalinstability on growth. Fifth, the broad measure of politicalinstability we use in this study can better capture the effectsof political instability on economic growth than 'elite' instabilitythat has been used by earlier researchers. Finally, principalcomponents estimation is used to develop a measure of politicalinstability that can serve as an alternative to the arbitraryweighting scheme used in previous research.