This article connects two streams in the literature on local political leadership by identifying the effect of leadership in form on the altering nature of leadership behaviour in the era of governance as a promising field of research. In particular, it argues to proceed with a comparative new institutionalism agenda. In order to illustrate this approach it uses data from a comparative project on local political leadership in Europe and focuses on mayor business orientation as an aspect of external networking. The analysis shows institutional form matters, but is highly contingent upon leadership context and characteristics. Future research should not only improve the conceptualization of form and extend the scope of leadership behaviour under study, but also probe into the causal mechanisms that relate form, context and characteristics.