This paper analyzed the paradigm structure of economics studies and summarized five different forms of paradigm shifts in past economics studies, and revealed the conditions and timing of paradigm shifts in economics studies. If a new research paradigm entailed a broader logical space than the old one, or it could adapt to the socio-economic development level and the pattern of vested interests, it would form and replace the old one. However, the paradigm shift of economics is complicated and repetitive, sometimes even backward, rather than straightforward.

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