This paper investigates the correlation between equipment investment and economic growth, and its compatibility with the Solow growth model. The paper improves on previous work by starting from an explicit theoretical model, using recent data on human capital, taking a rigorous approach to...

Observable variables capturing initial conditions can account for well over half of the variation in developing country growth rates. This paper investigates their role in explaining Africa's recent economic history. Should the origins of slow growth be traced to Africa's social arrangements,...

This paper introduces a framework for studying the optimal dynamic allocation of foreign aid among multiple recipients. We pose the problem as one of weighted global welfare maximization. A donor in the North chooses an optimal path for international transfers, anticipating that consumption and...

Since the early 1990s, there has been a renaissance in the study of regional growth, spurred by new models, methods and data. We survey a range of modelling traditions, and some formal approaches to the ’hard problem’ of regional economics, namely the joint consideration of agglomeration and...

We introduce a new `supply-push' instrument for foreign aid, to be used together with an instrumental variable estimator that filters out unobserved common factors. We use this instrument to study the effects of aid on macroeconomic ratios, and especially the ratios of consumption, investment,...

This paper introduces a framework for studying the optimal dynamic allocation of foreign aid among multiple recipients. We pose the problem as one of weighted global welfare maximization. A donor in the North chooses an optimal path for international transfers, anticipating that consumption and...

We investigate the existence of a middle-income trap using finite state Markov chains, constant growth thresholds, and mean passage times. As well as studying output per head, we examine the dynamics of its proximate determinants: TFP, the capital-output ratio, and human capital. We find upwards...

Major output collapses are costly and frequent in the developing world. Using cross-country data, we classify five-year periods using a two-dimensional state space based on growth regimes and political institutions. We then model the joint evolution of output growth and political institutions as...