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Mr. Masahiro Nozaki
How much of an internal rate of return would a sustainable pay-as-you-go pension system offer current and future generations equally? The answer is the sum of the Long-Run Biological Interest Rates (LBIR), the real-world equivalent of Samuelson’s (1958) biological interest rate, and future productivity growth. Reflecting global population ageing, the median LBIR across 172 countries is as low as 1 percent per year. The LBIRs are particularly low in advanced countries, estimated to be negative in many of them, and require ample financial reserves today or future productivity growth to maintain participation in pension schemes. On the other hand, the LBIRs in less developed regions, such as in sub-Saharan Africa, are relatively high, indicating a potential to use a pay-as-you-go scheme to expand the coverage of public pensions. Raising the retirement age by five years brings up the LBIR by 40 basis points, significantly improving the long-run budget constraint of a pension scheme.
Mr. Kevin J Carey
,
Mr. Sanjeev Gupta
, and
Ms. Catherine A Pattillo

Abstract

Growth in sub-Saharan Africa has recently shown signs of improvement, but is still short of levels needed to attain the Millennium Development Goals. Economists have placed increasing emphasis on understanding the policies that promote sustained jumps in medium-term growth, and the paper applies this approach to African countries. The evidence presented finds an important growth-supporting role for particular kinds of institutions and policies, but also highlights aspects of growth that are still not well understood. The paper includes policy guidance for ensuring that the poor benefit from growth.

Mr. Jean-Claude Berthélemy
and
Mr. Ludvig Söderling
This paper examines past African growth experience and attempts to simulate future ones. In addition to more commonly used determinants of total factor productivity, a measure of the effect of labor reallocation and an index of economic diversification are constructed and included as factors for long-term growth. A simple model is constructed for the purpose of simulating growth scenarios up to the year 2020 for Burkina Faso, Côte d'Ivoire, Ghana, Mali, Tanzania, and Uganda. Even if one makes relatively optimistic assumptions, Africa is not likely to reach "Asian tiger" levels of growth. The results also suggest that growth will depend, to a large extent, on educational investments and productivity gains in agriculture.