- Refers to varying the amount of trade (or other activity) of a firm, industry, or country by varying the number of products that it trades, as opposed to the intensive margin at which it would vary the quantity of trade of a given number of products.
- (written as Extensive Margin)A small change in the amount of an input used (e.g. number of workers, number of exporters). It is contrasted with the intensive margin: a small change in a characteristic of an input (e.g. hours per worker, exports per exporter).