The bottom of the pyramid (BoP) approach popularised by Prahalad and Hart (2002), calls for the engagement of business with the bottom segment of the global income pyramid, and has attracted considerable attention and debate. The BoP lens is applied chiefly to communities experiencing ?extreme...

This report describes a simple chemical free method that was successfully used by a team of European and Indian scientists (www.qub.ac.uk/tipot) to remove arsenic (As) from groundwater in a village in West Bengal, India. Six such plants are now in operation and are being used to supply water to...

This report describes a simple chemical free method that was successfully used by a team of European and Indian scientists (www.qub.ac.uk/tipot) to remove arsenic (As) from groundwater in a village in West Bengal, India. Six such plants are now in operation and are being used to supply water to...

This paper advocates the problem of estimating the population mean of the study variable y using the information on two auxiliary variables x and z. We have suggested the family of chain ratio exponential type estimators in two-phase (or double) sampling. The bias and mean squared error (MSE)...

This paper deals with the problem of estimating population variance <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$${{S}_{\rm y}^2}$$</EquationSource> </InlineEquation> of the study variable y. We have suggested a family of estimators of population variance <InlineEquation ID="IEq2"> <EquationSource Format="TEX">$${{S}_{\rm y}^2}$$</EquationSource> </InlineEquation> using the transformations on both the study variable and the auxiliary variable when...</equationsource></inlineequation></equationsource></inlineequation>