“…For example, a firm's level of sales, labour cost, capital per worker, location, share of sales in the domestic market and so on can influence export behaviour. External factors, such as the presence of foreign firms, the industry and region specifics, can also have an influence on the export activity of domestic firms (Aitken & Harrison, ; Karpaty & Kneller, ; Sun, ). Clearly, not every firm engages in export activity, because firms differ from one another in their characteristics that lead them to their own production decisions.…”