Industry Contribution Analysis (ICA) is a method used to estimate the wider economic contribution of an existing Industry or group of Industries in a region, at their current levels of production. ICA shifts the traditional I-O framework to see what Industries, and what level of production in these Industries, is being supported by current activity. ICA Events are distinct from Impact Events because they employ a constraint that removes feedback linkages or buy backs to the Industry being analyzed. Learn more in Explaining Event Types.