Some researches associate the permanence of the growth potential companies in the market with the characteristics of entrepreneurs, or what has been called self-efficacy, rather than with factors inherent in the productive structure of companies or to the context in which they develop. For this approach, the explicatory variables that could answer the research question are more related to the competences of the entrepreneur or business-owner, his previous work and professional experience in the economic sector of his firm, and even his level of schooling. For Lazaer, the characteristics associated with the entrepreneur's human capital, such as his educational and professional level, explain a good part of the probability for his company to be considered as dynamic. This chapter explores self-efficacy as a predictor of SMEs with growth potential.