BBCE data for entrepreneurs by sectors aligned with Law-Robson definitions for towns with a population of 10,000 and over in England and Wales 1851-1911. Definitions of urban areas converted to digital files and GIS from Law, C. M. (1967) The growth of urban population in England and Wales, 1801-1911, Transactions, Institute of British Geographers, 41, 125-43; Robson, B.T. (1973) Urban Growth: An approach, Methuen, London. Detailed definitions and method given in WP 6. The downloads include the total number of the economically active population from the BBCE broken down by sector, sex, for employers, own-account proprietors, and workers. All data are weighted for 1861 archival loss (E&W) and census non-response bias in 1891-1911.