Nevertheless, further analysis reveals this field to be relatively complex, because the subsequent migration of shopkeepers, carriers and various investors – not to mention social migrations such as family reunifications, second- and third-generation marriages as well as collective solidarities – all superimpose themselves on labour migrations. In a subsequent phase, political migrations by asylum seekers – for example, Kurds, Assyro-Chaldeans, Armenians and Alevis as well as refugees of leftist parties – have acquired ever increasing importance. There is, consequently, great diversity in the reasons for, and causes of, Turkish migration. The migration movement inside this field is intense, owing to the road, sea-going and air network forms of transport that Turks themselves use and run, largely based within their own travel agencies, transport companies and communication satellites