"Your points on market differentiation are well taken but perhaps not yet deep enough. I find it a difficult field in which to work successfully... without first addressing gender differences (male head of household will often define "need" without real reference to or understanding of gender inequalities) ... that which is safe or tolerable to an Indian male (e.g. open defecation fields at night ) is NOT to a second class female (read wife or daughter). They, the women and adolescent females,..."moreless