Party statutes and party institutionalization

Studies of party- and party-system stability have often explored the connection between the party-level property of Party Institutionalization (PI) and parties’ electoral performance and organizational longevity, yet scholars still have not agreed on a standard measure for this concept. This article argues that the length of party statutes could provide part of such a measure, specifically for the extent to which parties have become routinized (a key dimension of PI) through the formalization of their rules and practices. We validate the plausibility of this measure using data on 303 parties from 49 countries, demonstrating that party statute length varies systematically and in ways predicted by our knowledge of how party organizations reflect their institutional environments and the complexity of internal coalitions. We also show that statute length varies in expected ways with attributes often associated with higher or lower levels of party institutionalization. We conclude that statute length offers a conceptually congruent and objective indicator of formalization, one that could be used either alone or combined with measures of parties’ informal practices to advance our understanding of the relationship between PI and democratic development.