“…To show "how competition and political institutions affect lobbying expenditures and expected net returns for private and collective lobbying" (Godwin, Lopez, & Seldon, 2008, p. 1) Baskerville, 2007;Breton & Zaporozhets, 2009;Godwin et al, 2008;Law & Pan, 2009;Le Breton, Sudhölter, & Zaporozhets, 2012;Madani, 2010;Schneider, Lang, Leifeld, & Gundelach, 2007b;Ward, 2004 Budget/resources analysis To explore budget and other resources (e.g., personnel) of lobby organizations to gain an impression of their relative or absolute power in effectuating policy change, often using large scale datasets Antia, Kim, & Pantzalis, 2013;Baumgartner et al, 2009;Chalmers, 2013;Klüver, 2012Klüver, , 2013Oyinlade & Haden, 2004;Richter, Samphantharak, & Timmons, 2009 (Pooled) Time series analysis To explore the development of relationships between state and interest groups, to explore the changes within or between lobby groups over time, or to research changes in policy agendas over time Kaufman & Segura-Ubiergo, 2001;Leech et al, 2005;Mahoney & Baumgartner, 2009 Note. All authors in bold refer to key texts on the specific research method.…”