The method of measuring the effectiveness of ads uses optical scanning equipment that identifies the households of consumers who agree to participate in the study and gives the research company their demographics.

Single-source tracking .

Explanation:

Single-source tracking is a method used by organizations whose objective is to measure the results of an advertising campaign.

It is relevant that companies use methods to measure advertising, as it is believed that there is a loss of resources with marketing campaigns that do not help to achieve goals and results, this is often because a marketing campaign is not effectively targeted and served to the sources your potential customer most visits.

Therefore the Single-source tracking method uses data provided by individuals and stores them in a single source database which is a data set on purchase and sale registration, loyalty card usage registration, tv tuning registration and family geographic information meters. This is an effective ally for a company's performance measurement and advertising fluctuation aids.

answer; 33,000;

answer; no individual buyer or seller has any significant impact on the market price;