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Firms often mindlessly adopt IT due to institutional pressure, which often leads to hastened and irrational decisions. Institutional pressure is therefore often considered as a negative effect on IT adoption. That is because little literature investigates into the adaptation effect after IT adoption due to institutional pressure. We advocate that institutional pressure indeed has a catalyzing effect on IT adoption in general, but firms can still mindfully correct the hastened decisions into a competitive advantage over time. We call this phenomenon dynamic isomorphism, which describes the IT adaptation process after institutional pressure. We propose to investigate in dynamic isomorphism by the use of a cross-case analysis, as it can provide an in-depth explanation of the proposed phenomenon.