A frequent claim in the entrepreneurship literature is that employees learn to become entrepreneurs during paid employment. We revisit this mechanism in the context of the well-established finding that smaller firms generate higher rates of entrepreneurship. We propose a novel mechanism responsible for higher rates of entrepreneurship emanating from smaller firms: large firms might have a advantage over small firms in providing internal opportunities to retain entrepreneurial talent. We test this claim in a setting where firm dissolution extinguishes internal opportunities, using a new hand-collected data set of career histories in the automatic speech recognition (ASR) industry. For nondefunct firms, we replicate the “small-firm effect.” H...