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The net present value method versus the option value of waiting : a note on Farzin, Huisman and Kort (1998)
Doraszelski, Ulrich, (2001)
An R&D race with knowledge accumulation
Doraszelski, Ulrich, (2003)
Innovations, improvements, and the optimal adoption of new technologies
Doraszelski, Ulrich, (2004)