Adaptation or inflexibility? Niche party responsiveness to policy competition, with evidence from regionalist parties

Abstract

AbstractDespite a growing literature on niche parties, little is known about whether and how these parties are responsive to policy competition. Drawing upon data on regionalist parties’ programmatic strategies across Western Europe from 1971 to 2009, I find that these niche parties are more ideologically flexible than previously posited when facing governmental policy appeasement. While they do not shift to a more extreme issue position following increases in a region's decentralization level, regionalist parties do broaden their issue agenda. Issue diversification, however, is limited to those parties whose goals are being met; dissatisfied secessionist parties do not expand their issue emphases after decentralization reforms short of independence. Supported by emerging evidence of similar agenda diversification among appeased green and radical right parties, these analyses further our understanding of niche parties as strategic actors and offer new explanations for variation in the effectiveness of mainstream party tactics towards them.