Bob Costanza is a world renowned name in ES. Matthew Wilson, in Costanza's group, is an active ES researcher with major worldwide connections. He is sub-contracted to a six-year research programme on ES in New Zealand by Wratten and Cullen. Wratten is a prolific, internationally-active ecological researcher specialising in biological control and other ecosystem services in agriculture. His sixth book was published in November 2004: Ecological Engineering for Pest Management (with G. Gurr of the University of Sydney and M. Altieri at the University of California, Berkeley). Cullen is an environmental economist working and publishing actively in the evaluation of ES in agriculture and the importance of ES for the tourism industry. He plays a key r#244;le in the above New Zealand research programme.