The present paper re-examines the effectiveness of foreign aid theoretically and empirically. Using a standard OLG model we show that aid inflows will in general affect long-run productivity. The size and direction of the impact may depend on policies, 'deep' structural characteristics and the size of the inflow. The empirical analysis investigates these possibilities. Overall we find that aid has been effective in spurring growth, but the magnitude of the effect depends on climate-related circumstances. Finally, we argue that the Collier-Dollar allocation rule should be seriously reconsidered by donor agencies if aid effectiveness is related to climate.

Abstract. The present study examines whether the Preston curve reflects a causal impact of income on longevity or, for example, factors correlated with both income and life expectancy. In order to understand the Preston curve better, we develop a model of optimal intertemporal consumption in which the representative consumer is subject to physiological aging. In modeling aging we draw on recent research in the fields of biology and medicine. The speed of the aging process, and thus the time of death, are endogenously determined by optimal health investments. We calibrate the model to US data and proceed to show that the model accounts for nearly 80% of the cross-country differences in life expectancy that the Preston curve captures.

Abstract:The latitude gradient in comparative development is a striking fact: as one moves away from the equator, economic activity rises. While this regularity is well known, it is not well understood. In the present paper we take a step towards unpacking this gradient. Perhaps the strongest correlate with (absolute) latitude is the intensity of ultraviolet radiation (UV-R), which epidemiological research has shown to be a cause of a wide range of diseases. We establish that UV-R is strongly and negatively correlated with economic activity, both across and within countries. We propose, and test, a mechanism that links UV-R to current income differences via the impact of disease ecology on the timing of the take-off to sustained growth.

The present paper examines a neglected determinant of aggregate productivity: temporary cross-border flows of people. We hypothesize that interaction between people from different nations facilitates the international diffusion of ideas, thus stimulating aggregate productivity. In order to assess the causal impact of people flows on productivity, we construct an instrument for people flows. By analogy to the trade/growth literature, this instrument is derived from a fitted gravity equation involving geographic determinants of bilateral travel flows. Our cross-section analysis reveal that greater international interaction leads to higher productivity; a very similar result, qualitatively as well as quantitatively, is obtained when we employ dynamic panel data methods for the purpose of identification.

This paper estimates the total effect of power outages on economic growth in Sub-Saharan Africa over the period 1995-2007. Outages are instrumented using a satellite-based measure of lightning density. As suggested by Henderson et al. (2011), we also combine Penn World Tables GDP data with satellite-based data on nightlights to arrive at a more accurate measure of economic growth. Our results suggest that the annual economic growth drag of a weak power infrastructure is about 2 percentage points.

Abstract. The present study examines whether the Preston curve reflects a causal impact of income on longevity or, for example, factors correlated with both income and life expectancy. In order to understand the Preston curve better, we develop a model of optimal intertemporal consumption in which the representative consumer is subject to physiological aging. In modeling aging we draw on recent research in the fields of biology and medicine. The speed of the aging process, and thus the time of death, are endogenously determined by optimal health investments. We calibrate the model to US data and proceed to show that the model accounts for nearly 80% of the cross-country differences in life expectancy that the Preston curve captures.

Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in EconStor may January 2010Abstract. Evidence from economics, anthropology and biology testifies to a fundamental household trade-off between the number of offspring (quantity) and amount of nutrition per child (quality). This leads to a theory of pre-industrial growth where body size as well as population size is endogenous. But when productive quality investments are undertaken the historical constancy of income per capita seems puzzling. Why didn't episodes of rising income instigate a virtuous circle of rising body size and productivity? To address this question we propose that societies are subject to a "physiological check": if human body size rises, metabolic needs -our conceptualization of "subsistence requirements" -rise.This mechanism turns out to be instrumental in explaining why income growth does not take hold and societies remain near an endogenously determined subsistence boundary.When we use the theory to shed light on pre-industrial cross-country income differences we find that 60-70% of the income differences in 1500 can plausibly be accounted for by variations in subsistence requirements.

This paper provides a framework that decomposes aggregate total factor productivity (TFP) into a component reflecting relative efficiency across sectors, and another component that reflects the absolute level of efficiency. A development accounting analysis suggests that as much as 85% of the international variation in aggregate TFP can be attributed to variation in relative efficiency across sectors. Estimation results show that recent findings highlighting the importance of strong protection of property rights, financial development and geographical advantage for the level of TFP, can be explained by their impact on relative efficiency.