Media type: E-Article Title: A Model of Optimal Labour and Soil Use with Shifting Cultivation Contributor: Pascual, Unai; Barbier, Edward B. Published: Elsevier BV, 2001 Published in: SSRN Electronic Journal (2001) Language: English DOI: 10.2139/ssrn.291941 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: