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Other theorists, including Christian Betancur (2014)  and Rossiter and Percy (1985)  have proposed that need recognition should be included as the initial stage of any hierarchical model. Betancur, for example, has proposed a more complete process: NAITDASE model (in Spanish: NAICDASE). Betancur's model begins with the identification of a Need (the consumer's perception of an opportunity or a problem). Following the Attention and Interest stages, consumers form feelings of Trust (., Confidence). Without trust, customers are unlikely to move forward towards the Desire and Action stages of the process. Purchase is not the end stage in this model, as this is not the goal of the client; therefore, the final two stages are the Satisfaction of previously identified and agreed needs and the Evaluation by the customer about the whole process. If positive, it will repurchase and recommend to others (Customer's loyalty).