Calculates fundamental IO matrices (Leontief, Wassily W. (1951) ); within period analysis via various rankings and coefficients (Sonis and Hewings (2006) , Blair and Miller (2009) , Antras et al (2012) , Hummels, Ishii, and Yi (2001) ); across period analysis with impact analysis (Dietzenbacher, van der Linden, and Steenge (2006) , Sonis, Hewings, and Guo (2006) ); and a variety of table operators.