Patterns of Innovation during the Industrial Revolution: a Reappraisal using a Composite Indicator of Patent Quality∗ Alessandro Nuvolari†a, Valentina Tartarib, and Matteo Trancheroc aScuola Superiore Sant'Anna, Pisa, Italy bCopenhagen Business School, Copenhagen, Denmark cHaas School of Business, UC Berkeley, USA August 5, 2019 Abstract We introduce a new bibliographic quality indicator for English patents granted in the period 1700-1850. The indicator is based on the visibility of each patent both in the contemporary legal and engineering literature and in modern authoritative works on the history of science and technology. The indicator permits to operationalize empirically the distinction between micro- and macroinventions. Our findings indicate that macroinventions did not exhibit any specific time clustering, while at the same time they were characterized by a labor-saving bias. These results suggest that Mokyr's and Allen's views of macroinventions, rather than conflicting, should be regarded as complementary. Keywords: Industrial Revolution; Patents; Macroinventions; Microinventions. JEL Code: N74, O31 ∗Acknowledgements: The authors want to thank Bart Verspagen, Tania Treibich, Abhishek Nagaraj, Sameer Srivas- tava, as well as participants to seminars at University C^oted'Azur, UNU-MERIT, Berkeley-Haas and to EMAEE 2019 at SPRU - University of Sussex for their helpful comments. We are indebted to Joel Mokyr, Ralf Meisenzahl, Morgane Louenan, Olivier Gergaud and Etienne Wasmer for sharing their data. The usual disclaimers apply. †Corresponding author: Alessandro Nuvolari, Scuola Superiore Sant'Anna, Pisa, Italy. Postal address: c/o Institute of Economics, Scuola Superiore Sant'Anna, Piazza Martiri 33, 56127, Pisa, Italy. E-mail:
[email protected]. 1 1 Introduction Technical change has traditionally occupied a central place in the historiography of the Indus- trial Revolution.