The Density of State Interest-Communities: Do Regional Variables Matter?

To better understand state interest-group politics, this studycompares two approaches to understanding the density of theirinterest communities. The first approach—Gray and Lowery'senergy, stability, area model of density—emphasizes asmall set of political and economic variables operative withineach state in accounting for density. The second, of which thereare several examples, emphasizes a regional level of analysis.The two approaches are evaluated as both independent and complementaryaccounts of state interest-community density using 1990 statelobby-registration data. Although some evidence of modest underspecificationin the Gray and Lowery model is found, regional or spatiallybased variables only have a small impact on the density of stateinterest-communities.