Illustrate the value of a strategy used for measuring the costs and resources used in the implementation process over and above the costs of the intervention itself in the context of a two-arm randomized controlled trial.

Modern irrigation technologies have been suggested as a means of conserving scarce water and reducing environmental pollution caused by irrigated agriculture. This paper applies an economic model of technology selection that provides a general framework to analyzing adoption of irrigation...

The Value of Trees project, funded bythe International Development Research Council ofCanada (IDRC), supported the joint efforts of theUniversity of Alberta and the University of Zimbabweto investigate the economic costs and benefitsassociated with trees and forests in the small holderfarming...

Summary Can the local commercialization of natural products contribute to reduced poverty and vulnerability? Commentary on this issue is mixed, with some observers being quite optimistic, while others hold a counterview. This paper explores the poverty alleviation potential of four products...

This paper reconstructs GDP from the output side for medieval and early modern Britain. In contrast to the long run stagnation of living standards suggested by daily real wage rates, output-based GDP per capita exhibits modest but positive trend growth. One way of reconciling the two series is...

We provide annual estimates of GDP for England between 1270 and 1700 and for Great Britain between 1700 and 1870, constructed from the output side. The GDP data are combined with population estimates to calculate GDP per capita. We find English per capita income growth of 0.20 per cent per annum...

This paper provides the first annual GDP series for Great Britain over the period 1700-1870. The series is constructed in real terms from the output side, using volume indicators and value added weights. Sectoral estimates are provided for agriculture, industry and services, and for a number of...