Party institutionalization index

Question: To what extent are political parties institutionalized?
Clarification: Party institutionalization refers to various attributes of the political parties in a country, e.g., level and depth of organization, links to civil society, cadres of party activists, party supporters within the electorate, coherence of party platforms and ideologies, party-line voting among representatives within the legislature. A high score on these attributes generally indicates a more institutionalized party system. This index considers the attributes of all parties with an emphasis on larger parties, i.e., those that may be said to dominate and define the party system.
Scale: Interval, from low to high (0-1).