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This paper defines economic slumps as sequences of structural breaks exhibiting a specific pattern. We identify 58 such episodes between 1950 and 2008 among 138 countries, and then examine the phases of decline and their duration. In some countries declines last extremely long, and we put several likely contributing factors to the test. We find evidence that weak institutions precede crises and, interestingly, positive reforms occur thereafter. Strong institutions shorten the duration of crises, ethnic cleavages do the reverse. However, the negative effects of ethnic cleavages are not insurmountable: an interaction effect suggests they can be offset by appropriate institutions.

This paper analyzes the duration of large economic declines and provides a theory of delayed recovery. First, we develop a formal political economy model that illustrates a simple mechanism of how weak constraints on the political executive can lead to longer declines in ethnically heterogeneous countries. The model shows how uncertain post-recovery incomes and a winner-take-all threshold effect create a commitment problem rendering a cooperative equilibrium inaccessible. Holding out can benefit groups by reducing the threshold effects in subsequent periods, thus limiting the remaining uncertainty. Placing strong constraints on the executive solves this commitment problem by reducing the uncertainty from the threshold effects, which brings about cooperation earlier on. Second, we then test several empirical predictions from the model using standard data on linguistic heterogeneity and more detailed data on ethnic power configurations. We find that the partial correlations are consistent with the proposed theory. The effect of executive constraints on the length of declines is very large in heterogeneous countries, but practically disappears in ethnically homogeneous societies. The adverse effect of heterogeneity is driven by the number of groups; increasing political concentration works in the opposite direction.

This paper analyzes the duration of large economic declines and provides a theory of delayed recovery. First, we develop a formal political economy model that illustrates a simple mechanism of how weak constraints on the political executive can lead to longer declines in ethnically heterogeneous countries. The model shows how uncertain post-recovery incomes and a `winner-take-all' threshold effect create a commitment problem rendering a cooperative equilibrium inaccessible. Holding out can benefit groups by reducing the threshold effects in subsequent periods, thus limiting the remaining uncertainty. Placing strong constraints on the executive solves this commitment problem by reducing the uncertainty from the threshold effects, which brings about cooperation earlier on. Second, we then test several empirical predictions from the model using standard data on linguistic heterogeneity and more detailed data on ethnic power configurations. We find that the partial correlations are consistent with the proposed theory. The effect of executive constraints on the length of declines is very large in heterogeneous countries, but practically disappears in ethnically homogeneous societies. The adverse effect of heterogeneity is driven by the number of groups; increasing political concentration works in the opposite direction.

We investigate how changes in the administrative-territorial structure affect ethnic voting. We present an event study design that exploits the 2010 constitutional reform in Kenya, which substantially increased the number of primary administrative regions. We find (i) strong evidence for a reduction in ethnic voting when administrative regions become less ethnically diverse and (ii) weak evidence for such a reduction when ethnic groups become less fragmented across regions. These results suggest that 'ethnofederal' reforms (leading to administrative borders that more closely follow ethnic boundaries) can mitigate ethnic politics in diverse countries.

We study the link between subnational capital cities and urban development using a global data set of hundreds of first-order administrative and capital city reforms from 1987 until 2018. We show that gaining subnational capital status has a sizable effect on city growth in the medium run. We provide new evidence that the effect of these reforms depends on locational fundamentals, such as market access, and that the effect is greater in countries where urbanization and industrialization occurred later. Consistent with both an influx of public investments and a private response of individuals and firms, we document that urban built-up, population, foreign aid, infrastructure, and foreign direct investment in several sectors increase once cities become subnational capitals.

This paper studies periods of prolonged contractions in output per capita in a sample of 145 countries from 1950 to 2014. Economic slumps are defined as abrupt interruptions of a period of growth by several regime switches. Slumps start with a sharp contraction along with a trend break, which is followed by another switch when growth stabilizes again. The paper then analyzes the correlates of these slumps, focusing on the length and depth of the contraction, from the beginning of the slump to its trough. The results establish three new stylized facts: (i) weak political institutions predate crises whereas political reforms tend to follow them, (ii) the length and depth of economic declines are robustly correlated with executive constraints and ethnic heterogeneity, and (iii) there is a robust interaction between these two variables, suggesting that institutions constraining leaders are important for stabilizing growth. This is particularly relevant for Sub-Saharan Africa, where politics are often ethnic and decision makers are comparatively unconstrained.

This paper analyzes periods of economic stagnation in a panel of countries. We test whether stagnation can be predicted by institutional characteristics and political shocks and compare the impacts of such variables with those of traditional macroeconomic variables. We examine the determinants of stagnation episodes using dynamic linear and nonlinear models. In addition, we analyze whether the effects of the included variables on the onset of stagnation differ from their effects on the continuation of stagnation. We find that inflation, negative regime changes, real exchange rate undervaluation, financial openness, and trade openness have significant effects on both the onset and the continuation of stagnation. Only for trade openness is there robust evidence of a differential impact. Open economies have a significantly lower probability of falling into stagnation, but once in stagnation they do not recover faster.