Analysis and definition of the objectives in genetic improvement programmes in sheep and goats. An economic approach to increase their profitability. Proceedings of the meeting of the sub-network on genetic resources of the FAO-CIHEAM Inter-Regional Cooperative Research and Development Network on Sheep and Goats, jointly organized by CIHEAM and FAO-REU, with the support of FAO-AGA, Zaragoza (Spain), 18-20 November 1999.