An extract from The Dominance and Monopolies Review - 7th edition
Market definition and market power
Brazil's Competition Law provides that a dominant position is presumed when 'a company or group of companies' controls 20 per cent of a relevant market. Article 36 further provides that CADE may change the 20 per cent threshold 'for specific sectors of the economy', although the agency has not formally done so to date. The 20 per cent threshold is relatively low compared with that in other jurisdictions, especially the United States and the European Union. CADE has traditionally interpreted the expression 'group of companies' to encompass companies belonging to different economic groups that could jointly abuse power in a given market, even if no single member of the group holds market power on its own.
The new CADE is yet to issue secondary legislation setting formal criteria for the analysis of alleged anticompetitive conduct, and the agency has been relying on regulations issued under the previous law, primarily CADE Resolution No. 20/1999.
Annex II of CADE Resolution No. 20/99 sets criteria for the definition of the relevant market in terms of both product and geographic dimensions. The methodology is mostly based on substitution by consumers in response to hypothetical changes in price. The resolution incorporates the small but significant and non-transitory increase in price test, aiming to identify the smallest market within which a hypothetical monopolist could impose a small and significant non-transitory increase in price – usually taken as a price increase of 5 to 10 per cent for at least 12 months. Supply-side substitutability is also sometimes considered for market definition purposes. As for measures of concentration, reference is made to both the CRX Index and the Herfindahl-Hirschman Index.