“…Christopher, 1984) has produced studies concerned mainly with general patterns of settlement (Christopher,~982; Guelke and Shell, 1983;Norton and Smit, 1977), with the impact of government policies (Christopher, 1983a;Pirie, 1984), with rural landscapes (Christopher, 1976) and with aspects of urban pattern and form (Christopher 1983b;Norton, 1979). The long-term growth and changing patterns of location of major economic institutions have not yet been examined in any detail, though there are signs that this want may soon be addressed (e.g., Tucker, 1985;Pirie, 1982). The geography of large enterprises has become a significant focus of research in the past decade Watts, 1980).…”