Compensating variation consumer's surplus via succesive approximations

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Many economists agree that the best measure of consumer's surplus is the compensating Variation Consumer's surplus (CVCS). Howerver, Because the compensated demand function is not observable, there are problems in using this measure in emperical applications. There are ways around this limitations that work well under certain circumstances, However, until now there has been no solution that always works well. We introduce a sucessive approximations method of calculating compensating variation consumer’s surplus using data from the ordinary demand curve. In doing so we numerically identify the compensated demand fuction over the price interval involved. This procedure can be made extremely ‘small’. We also use our method to calculate CVCS for three applications in the literature where Marshallian surplus was reported.