Die Dis cus si on Pape rs die nen einer mög lichst schnel len Ver brei tung von neue ren For schungs arbei ten des ZEW. Die Bei trä ge lie gen in allei ni ger Ver ant wor tung der Auto ren und stel len nicht not wen di ger wei se die Mei nung des ZEW dar.Dis cus si on Papers are inten ded to make results of ZEW research prompt ly avai la ble to other eco no mists in order to encou ra ge dis cus si on and sug gesti ons for revi si ons. The aut hors are sole ly respon si ble for the con tents which do not neces sa ri ly repre sent the opi ni on of the ZEW. (Version November 9th, 2015) Abstract Based on an established theoretical framework of the drivers of inventive performance, the so-called KSAO (Knowledge, Skills, Abilities, and Other) factors, this paper seeks to explain empirically the performance of inventors throughout their careers. We combine survey information spanning the inventors' entire careers and psychometric test evidence, with patent history data for more than 1,000 inventors. We also control for variables that have traditionally been included in estimations of inventive performance such as inventor age and a broad list of applicant institution-, technology-, patent-, and period-related information. We show that educational level, skills acquired during the career, personality traits, career motivations, cognitive abilities, and cognitive problem-solving style are significantly related to inventive performance. Key-words: Inventive performance; individual drivers; patent history; survey JEL Codes: J24; M54; O31; O32 1 Corresponding author. University of Würzburg, Sanderring 2, 97070 Würzburg, E-Mail: thomas.zwick@uni-wuerzburg.de. We would like to thank Lee Doris, Francesco Lissoni, Eduardo Melero, and Jana Oehmichen for good suggestions. We also thank the OECD for providing us with the classifications of clean technology patents. The authors acknowledge financial support from Deutsche Forschungsgemeinschaft (DFG)