Robert S. Pindyck has made significant contributions to a wide and diverse range of economic literatures; summarising them is challenging. To keep the length of this chapter manageable, I confine my discussion to four areas in which his contributions have been particularly notable: (i) economic applications of optimal control theory; (ii) market structure and the exploitation of non-renewable resource markets; (iii) uncertainty, irreversible investments and option values; and (iv) economic issues underlying climate change and climate policy. Pindyck has been a highly acclaimed educator in MIT classrooms, winning numerous teacher awards. He has also been a successful textbook author, with both his microeconomics and econometrics textbooks having been published in multiple editions.