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If we accept that entrepreneurs are influenced by culture, then the simplest possible unit of research for understanding entrepreneurship is not the entrepreneur. Nor is it a laboratory study of individuals nor even a field study comparing entrepreneurs, but rather it is useful to have a case study in which the important aspects of environment are analysed and understood. It is doubtful, then, that a mail survey or even interviews could be sufficient for a researcher to truly gain a holistic understanding of the entrepreneurial process.
Dana et al. (Sat,) studied this question.