Niche party literature identifies a kind of party that is different because it is in a particular strategic situation. This concept is extremely useful because it helps to explain differences in party behaviour on demands as diverse as electoral competition, legislative behaviour or executive policy. At the same time, the definitions of what constitutes a niche party differ considerably. These differences hindered systematic research into the effects of niche parts and made comparisons worse. Green parties are the most obvious niche parties, followed by special parties, ethnic-regionalist parties and nationalist parties. These results suggest that previous research has not paid sufficient attention to parties with specific problems. As the name suggests, their political profiles focus on selected themes and should therefore present a high niche, which is well understood in our action. On the other hand, the Social Democrat and Liberal parties focus on a similar set of traditional subjects. In the full sample, the other party families are between these extremes. As many scholars are interested in comparisons within a certain party system, it is useful to use the standardized niche note that expresses a party`s niche relative to the niche of its rivals. These values are displayed in the last column of Table 1. In both cases, the Social Democrats are the party closest to the mainstream.

However, its impact on the party system is much higher in example 2. Similarly, the proposed measure designates the Greens as the „nichy“ party. However, in example 1, its distinctiveness is much greater than in example 2. Parties can also „develop“ potential economic niche issues. The framework means highlighting certain aspects or dimensions of a theme (Chong and Druckman, 2007; Sides, 2006). The Norwegian Progress Party (FrP) in the 1970s and 1980s is an example of this strategy. Based on her background as an anti-tax party, she outlined the issue of economic immigration. She opposed immigration and argued that financial resources should be devoted to elder care and the health care system rather than the needs of immigrants (Andersen and Bjorklund, 2008); Hail, 2003; Valen and Rokkan, 1974). As a result, the focus on economic issues was quite significant.