Karl Ulrich of the Wharton School said the quality of execution contributes significantly to an entrepreneurial venture’s success. “That factor should be pretty consistent for a given entrepreneur over his or her career,” he said. “This would be one explanation for why some entrepreneurs—those with great skills—are consistently successful.”
https://www.nytimes.com/2020/01/10/your-money/entrepreneurship-success.html The New York Times