McMenamin, Iain ORCID: 0000-0002-1704-390X (2021) Three Circles: Firms and Parties from the Twentieth to the Twenty-First Century. In: Kellow, Aynsley ORCID: 0000-0002-6413-0766, Porter, Tony and Ronit, Karsten, (eds.) Handbook of Business and Public Policy. Handbooks of Research on Public Policy . Edward Elgar, Cheltenham, UK, pp. 42-56. ISBN 978 1 78897 911 5