Introduction; K.Gilland Lutz & S.Hug Campaign Spending and Ballot Measures; T.Stratmann Regulating Campaign Finance in Canadian Referendums and Initiatives; R.Johnston US States; D.Smith Campaign Financing in Danish Referendums; S.Binzer Hobolt Financing Referendums and Initiatives in the Baltic States; D.Auers, J.Ruus & A.Krupavicius The Financing of Referendum Campaigns in France; F.Hamon Referendums and Spending in Ireland; K.Gilland Lutz Financing Referendum Campaigns in Italy; R.Ricci Financing Referendum Campaigns in Spain; C.Closa Montero & F.Carbonell Bellolio Referendum Campaign Regulations in Switzerland; U.Serdült Sledgehammers and Nuts? Regulating Referendums in the UK; N.Singh Ghaleigh Referendum Campaign Regulations in Europe and Latin America; T.Zellweger, U.Serdült, A.Zda & I.Renfer Conclusion; K.Gilland Lutz & S.Hug