"Donovan Rypkema is president of Heritage Strategies International, a Washington DC consulting firm. His book, "The Economics of Historic Preservation: A Community Leader's Guide" , is now in its third edition and his firm has had clients including the World Bank, the Inter American Development Bank, the Council of Europe and the United Nations Development Programme. He's in New Zealand as a guest of the Civic Trust Auckland." (Text from RNZ Website)
http://podcast.radionz.co.nz/ntn/ntn-20150313-0931-how_important_is_heritage_preservation_in_our_cities-048.mp3

Donovan Rypkema's  Heritage Strategies International website:
http://www.hs-intl.com/