Day, Richard H Modelling economic change the recursive programming approach Richard H. Day and Alessandro Cigno, with contributions by M. Abe ... et al. - Amsterdam : North-Holland Pub. Co, 1978. - 447pages ; 22 cm. - Contributions to economic analysis 117. . Includes index. ISBN: 0444850562 Subjects--Topical Terms: Economics--Mathematical models.Recursive programming.