Abstract
This article explores variations in labor PAC contribution patterns. The conclusions drawn are based on interviews with union political operatives, and on a principal component and cluster analysis of labor PAC expenditures in 1984 House elections. The principal component analysis confirms that unions typically pursue an electoral strategy. The analysis also reveals important ideological cross currents, including conflicting practices of support for conservatives versus support for ideological allies. The principal component analysis is extended with the aid of clustering techniques, which are used to lend precision to the diversity in labor PAC contribution patterns. Five clusters of unions are identified, each displaying a distinct allocation strategy.
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