Shyamal Chowdhury, Annabelle Krause, Klaus F. Zimmermann, 28 April 2016

Across the world, 650 million people still lack access to clean water, despite great progress over last two decades. This column looks at the case of Bangladesh, where around 45 million people are at risk from drinking water that is contaminated with naturally occurring arsenic. Drinking this water can lead to symptoms of arsenicosis, which have a significant negative impact on mental health and thus on household productivity and wellbeing.

Martin Foureaux Koppensteiner, Marco Manacorda, 18 April 2016

Stress and violence during the nine months in utero has been widely shown to have important effects on child development. To date this research has largely focused on extreme and relatively rare events. This column uses data from Brazil to explore how exposure to day-to-day violence can affect birth weight. The birth weight of newborns whose mothers are exposed to a homicide during their first trimester is significantly lower. This effect is smaller for mothers who live in more violent neighbourhoods, consistent with the interpretation that violence is more stressful when it is rare. 

Eva Arceo, Rema Hanna, Paulina Oliva, 16 April 2016

Pollution levels are orders of magnitude higher in lower-income countries than in the developed world. This means that studies of the health effects of pollution based on data from the latter will not necessarily be relevant to the former. This column reports on the effect of air pollution on infant mortality in Mexico City. Significant effects are found that are much larger than found in earlier work based on US data. These findings highlight the potential pitfalls of naively extrapolating findings from high-income to developing countries.

Alex Pienkowski, Joyce Miharu Saito, Suchanan Tambunlertchai, 28 March 2016

Initiatives to reduce public debt in low-income countries have made substantial progress over the past decade, but challenges remain and continue to evolve. This column presents the findings from a new IMF-World Bank report on these developments. Low-income countries have benefited from debt relief and favourable economic conditions, resulting in generally lower debt burdens and vulnerabilities. There has also been a shift in debt financing, with greater reliance on emerging market economies, international capital markets, and domestic sources. However, more recently, risks have begun to re-emerge necessitating fiscal prudence and improved debt management.

Gaurav Datt, Martin Ravallion, Rinku Murgai, 26 March 2016

There has been much debate about the poverty impacts of economic growth and structural transformation in developing countries. This column revisits these issues using a newly constructed dataset of poverty measures for India spanning 60 years. There has been a downward trend in poverty measures since 1970, with an acceleration post-1991, despite rising inequality. Post-1991 data suggest stronger inter-sectoral linkages. Urban consumption growth came with gains to both the rural and urban poor. The primary/secondary/tertiary composition of growth has ceased to matter, as all three sectors contributed to poverty reduction.

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