To identify the reasons why industrial firms had chosen a Hertfordshire location and to discover what kind of problems they were currently encountering in relation to that location-including labour supply, expansion, workers' housing, local restrictions on transport and local authorities' restrictions. Variables Standard Industrial Classification (see <i>Standard Industrial Classification</i>, HMSO, 1968), district. Ownership of firms, date of establishment in Great Britain/Hertfordshire, reasons for location in Hertfordshire, difficulties experienced by firms in their present locations, labour shortage for men and women separately.