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Estimates of the number of people living in extreme poverty, as reported by the World Bank, figure prominently in international development dialogue and policy. An assumption underpinning these poverty counts is that there are no economies of scale in household size-a family of six needs three times as much as a family of two. This paper examines the sensitivity of global estimates of extreme poverty to changing this assumption. The analysis rests on nationally representative household surveys from 162 countries covering 98 percent of the population estimated to be in extreme poverty in 2017. The paper compares current-method estimates with a constant-elasticity scale adjustment that divides total household consumption or income not by household size but by the square root of household size. While the regional profile of extreme poverty is robust to this change, the determination of who is poor changes substantially-the poverty status of 270 million people changes. The paper then shows that the measure that accounts for economies of scale is significantly more correlated with a set of presumed poverty covariates (years of schooling, literacy, asset index, working in agriculture, access to electricity, piped drinking water, and improved sanitation).

Economies of scale.

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The term “resilience” originated in environmental studies and describes one’s biological capacity to adapt and thrive under adverse environmental conditions. Regional economic resilience is defined as the capacity of a territory’s economy to resist and/or recover quickly from external shocks, often even improving on its prior situation (before the shock). The contributions in this book analyse different channels related to processes of mitigation (resistance–recovery) and adaptive resilience (reorientation–renewal), in a wide variety of geographical settings and scales. While the different chapters include relevant methodological advances in this literature, they also obtain relevant results from a policy perspective. Moreover, the wide spectrum of topics and analyses among the contributions in this book extend the current framework, to analyse regional economic resilience, from the intersection of several disciplines involving geographers, economists and demographers, as well as environmental scientists.

Development economics & emerging economies

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TRANSPORTS URBAINS --- ECONOMIES D'ENERGIE --- TRANSPORTS URBAINS --- ECONOMIES D'ENERGIE

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Africa's Pulse is a biannual publication containing an analysis of the near-term macro-economic outlook for the region. It also includes a section focusing on a topic that represents a particular development challenges for the continent. It is produced by the Office of the Chief Economist for the Africa Region.This issue is an analysis of issues shaping Africa's economic future. Growth remains stable in Sub-Saharan Africa. Some countries are seeing a slowdown, but the region's economic prospects remain broadly favorable. External risks of higher global financial market volatility and lower growth in emerging market economies weigh on the downside. In several Sub-Saharan African countries, large budgetary imbalances are a source of vulnerability to exogenous shocks and underscore the need for rebuilding fiscal buffers in these countries. The Ebola outbreak is exacting a heavy human and economic toll on affected countries and, if not rapidly contained, the risk of wider contagion grows. Without a scale-up of effective interventions, growth would slow markedly not only in the core countries (Guinea, Liberia, and Sierra Leone), but also in the sub region as transportation, cross-border trade, and supply chains are severely disrupted. In Sub-Saharan Africa, growth in agriculture and services is more effective at reducing poverty than growth in industry. Structural transformation has a role to play in accelerating poverty reduction in Sub-Saharan Africa. Increasing agricultural productivity will be critical to fostering structural transformation. Boosting rural income diversification can facilitate this transformation, as well. Investments in rural public goods and services (for example, education, health, rural roads, electricity and ICT), including in small towns, will be conducive to lifting productivity in the rural economy. Although Sub-Saharan Africa's pattern of growth has largely bypassed manufacturing, growing the region's manufacturing base, especially by improving its fundamentals, lower transport cost, cheaper and more reliable power, and a more educated labor force, will benefit all sectors.

Economies --- GDP --- Growth --- Macroeconomic Analysis

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Africa's Pulse is a biannual publication containing an analysis of the near-term macro-economic outlook for the region. It also includes a section focusing on a topic that represents a particular development challenges for the continent. It is produced by the Office of the Chief Economist for the Africa Region.This issue is an analysis of issues shaping Africa's economic future. Growth remains stable in Sub-Saharan Africa. Some countries are seeing a slowdown, but the region's economic prospects remain broadly favorable. External risks of higher global financial market volatility and lower growth in emerging market economies weigh on the downside. In several Sub-Saharan African countries, large budgetary imbalances are a source of vulnerability to exogenous shocks and underscore the need for rebuilding fiscal buffers in these countries. The Ebola outbreak is exacting a heavy human and economic toll on affected countries and, if not rapidly contained, the risk of wider contagion grows. Without a scale-up of effective interventions, growth would slow markedly not only in the core countries (Guinea, Liberia, and Sierra Leone), but also in the sub region as transportation, cross-border trade, and supply chains are severely disrupted. In Sub-Saharan Africa, growth in agriculture and services is more effective at reducing poverty than growth in industry. Structural transformation has a role to play in accelerating poverty reduction in Sub-Saharan Africa. Increasing agricultural productivity will be critical to fostering structural transformation. Boosting rural income diversification can facilitate this transformation, as well. Investments in rural public goods and services (for example, education, health, rural roads, electricity and ICT), including in small towns, will be conducive to lifting productivity in the rural economy. Although Sub-Saharan Africa's pattern of growth has largely bypassed manufacturing, growing the region's manufacturing base, especially by improving its fundamentals, lower transport cost, cheaper and more reliable power, and a more educated labor force, will benefit all sectors.

Economies --- GDP --- Growth --- Macroeconomic Analysis