Electrical data processing techniques are described for performing business analysis based on datasets that are incomplete (e.g., contain censored data) and/or based on datasets that are derived from a stage-based business operation. A first technique offsets the effects of error caused by the incomplete...http://www.google.cl/patents/US7676390?utm_source=gb-gplus-sharePatent US7676390 - Techniques for performing business analysis based on incomplete and/or stage-based data