Of the major kinds of physical infrastructure, electricity generating capacity has roughly the same marginal productivity as physical capital as a whole. So have roads-plus-rail, globally and in lower-income countries. Telephones, however, and transport routes in higher-income countries, have...

Resume : L'Afrique est sur le bord d'un lancement potentiel de croissance economique soutenue. Cette ascension peut etre acceleree par un dividende demographique du aux changements dans la structure par age de la population. Les baisses de la mortalite infantile, suivies par la baisse de la...

Large potential benefits of infrastructure may elude identification and measurement by conventional cost-benefit analysis. Canning and Bennathan estimate social rates of return on general capital, by examining the effect on aggregate output and comparing that effect with the costs of construction