AbstractThis paper focuses on the effects of entrepreneurial overconfidence at new venture creation. By analyzing Global Entrepreneurship Monitor data and using the theory of planned behavior as a framework, the study provides new evidence on the relative or absolute nature of overconfidence in entrepreneurial skills and the effect of overprecision on new venture creation. Overprecision of supporting beliefs is newly linked to venture creation and it is shown that nascent entrepreneurs’ overconfidence is based on a self-focusing attitude. The results confirm that overconfidence is not a single construct and highlights the differences between the forms of overconfidence habitually confused in the entrepreneurship literature.