Jarrold was born at Manningtree, Essex on 1 December 1770, and died in Manchester on 24 June 1853. He was educated at the University of Edinburgh, from which he reportedly took a degree in medicine, though this cannot be confirmed from the university's own records. He established a medical practice in Stockport some time before 1806, but by 1810 had relocated to Manchester, where he lived and worked for the remainder of his life. He published several medical works, and also on the poor laws. He is best known for his Dissertations on Man (1806), written while at Stockport and intended as a direct assault on the theories of malthus.
From The Biographical Dictionary of British Economists in Oxford Reference.