Party actors and party change: Does factional dominance matter?

. Other works have asked whether parties matter; this article asks whether parties’ dominant factions matter. Special focus is placed on whether change in dominant faction or coalition within the party tends to produce other significant party change, and under what circumstances. Three specific hypotheses are developed and tested, one involving motivation for change and the other two involving ‘resources’ which are necessary to make dramatic change possible. Empirical analysis rests upon original data covering seven changes in dominant faction and several dimensions of party change within five parties in the United Kingdom and Germany for the period 1950 to 1990. The authors conclude that not all of the hypothesized factors have equal impact on degree of party change, with ability of the newly dominant faction to control its coalition being primary.