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instruments for measuring markets are not developed, to the extent that it is not possibleto know all the economic agents in a market. However, the economic agents withgreater power can be detected, and it is possible to measure that power and the mannerin which it is divided.Likewise, it is necessary to consider the possibilities of access of the economic agentand its competitors to sources of inputs. This involves an important premise for severalreasons: first, because if it is a question of indexes that allow it to be determined if aneconomic agent has power in the relevant market, the access to sources becomes a decisiveelement. This is also a generally accepted factor in the competition laws of othercountries. In Mexico, the determination of sources of inputs has special relevance,because it is a country where sources have not had a balanced development, whichforces economic agents to go, with a costly transportation infrastructure, to other sourcesthat are far from the location of production, or to decide to import their inputs. Thesedifficulties can then be decisive in the definition of substantial power of any agent in therelevant market.The factor of “recent behavior” of the economic agent must also be taken into account.This information is also decisive, since for Mexico there are no accurate or extensivesources of information for many of its markets, as there are in other countries for eachof their markets and economic agents. Therefore, in our country, by taking into accountthe recent behavior of the economic agent, it is possible to have current information relativelyeasy to find and to which the competition authorities can go to obtain a reliableparameter. This contributes to a just determination of the substantial power of the economicagent in the relevant market.Finally, additional factors are somewhat broadly established, such as the “dominantposition” that the economic agent has with respect to the goods and services in the relevantmarket. The concept of dominant position is a very specific economic term notcontemplated in the law, but interpreted objectively can be considered as a descriptionof the situation of the economic agent or as the possibility this agent may have inthe goods and services market in question at the time of analyzing its substantialpower. In other words, what is looked for through this factor is the time, experience,investment, and administration of the economic agent in the goods and services marketin which it is involved in order to derive from such information characteristics of itspower in the market.The two remaining factors allude to the cost of or the lack of access to the goodsinvolved for consumers and the existence of “elevated cost differentials” that they mayconfront when going to other suppliers. In short, it is a question of more or less elasticityin the market that affects the rapidity with which the consumer can change one productfor another without incurring large costs and that obviously will have a directrelationship to the substantial power that the economic agent exercises in the market.251Economic Competition