Business model innovation (BMI) is a key performance driver for startups. Nonetheless, the reality is that new firms with new business models still face survival pressures. New institutional theory shows that legitimacy factors will affect the performance level of new ventures. Legitimacy is an important subject in the field of institution and organization, which refers to the extent to which an individual or organization’s behavior is accepted by the public and reflects the important influence of external institutional forces on the organization. Consequently, this study collected data from entrepreneurs in Eastern China and conducted a regression analysis, which revealed that novelty-based and efficiency-based business model innovation positively affects the performance of startups. Moreover, this study found that different dimensions of external legitimacy have different effects on the relationship between business model innovation and the performance of startups. Regulative legitimacy and normative legitimacy negatively regulate the relationship between novelty-based business model innovation and the performance of startups. In contrast, normative legitimacy positively regulates the relationship between efficiency-based business model innovation and the performance of startups. The study also found that cognitive legitimacy positively regulates the relationship between novelty-based business model innovation and the performance of startups. In summary, the study highlights the importance of considering the influence of different dimensions of external legitimacy on the relationship between business model innovation and the performance of startups. The findings suggest that legitimacy is a crucial factor affecting startups’ ability to improve their performance through business model innovation.

The high-quality development of urban innovation provides important support for implementing new development concepts, constructing new development patterns, and promoting high-quality development. Based on the Technology–Organization–Environment (TOE) theoretical analysis framework, this paper takes 19 first-tier cities and 30 second-tier cities as research samples, explores the multiple path combinations of the business environment on urban high-quality development from a configuration perspective, and uses the fsQCA method. The research results show that the following are true: (1) The innovation ecology is the sole necessary condition for the high-quality development of urban innovation development; (2) efficient financial services and comprehensive market size play a crucial role in enabling cities to achieve high-quality innovation development; and (3) there are three configurations driving high-quality urban innovation development, namely the “Balanced Synergy Pathway”, the “Organizational Synergy Pathway”, and the “Technological Synergy Pathway”. This study explores the impact of the coupling of the business environment on the high-quality development of urban innovation, reveals the diverse configuration relationships of the business environment in urban high-quality development, and has important theoretical and practical significance for the high-quality development policies of cities.