The voluminous strategy research on the determinants of corporate scope is often premised on a well-established property rights regime, which contrasts with the weak property rights protection that still characterizes most countries today. We address this gap by applying property rights theory to theorize and empirically examine how the strengthening of the property rights regime affects corporate scope. Our analysis exploits the enactment of a property law that enhanced the formal protection of private properties in China as a quasi-experiment. We show that with a strengthened property rights regime, the horizontal relatedness among private firms’ businesses increases, but their vertical relatedness decreases, compared with state-owned firms. Further, these effects are less prominent for politically connected firms that are afforded informal protection of property rights. Our findings shed new light on the property rights regime as a critical determinant of firms’ horizontal and vertical scope.

The Property Rights Theory states that clearly defined ownership is the premise of efficiency, while ambiguous property rights result in great externalities. We use the establishment of local SASACs as a quasi-natural experiment to investigate how unifying the supervision rights and responsibilities internalizes externalities and enhances SOEs’ innovation. The primary results show that the total innovation outputs and high-quality innovation outputs of SOEs governed by local SASACs (i.e., treatment group) improve after creating SASACs. The mechanism analyses show that both the pyramids level and risk-bearing level of local SOEs increase. In cross-sectional tests, we unravel that the innovation improvement effect is subject to the following five factors, including SASACs’ independence, local government quality, industry competition, SOEs managers’ motivation for promotion, and whether the SOE is in high-tech industry. Our paper provides empirical evidence for evaluating the innovation effect of the establishment of local SASACs with a quasi-natural experiment when the public ownership of SOEs does not change. Chun