Through the emergence of the European Union, it has meant that for Europeans it is easier to travel to member countries, and also it is easier to live and work in member countries.
Prior to the European Union, as a European you not only needed to show your passport at every border you also needed to secure a visa to live and work in a different European Country. Job vacancies were only open to the people who lived in that particular country and outsiders unless they were specialists in their field were usually given menial employment. There was difficultly in comparing qualifications, and job descriptions. This was partially due to language barriers but also due to a lack of locally shared knowledge.
Since the European Union, there has been several directives that job vacancies to not only be advertised country wide they have to be advertised European wide. This is not as global as it sounds as jobs like cleaners or shop assistants do not have to be advertised European wide, but jobs such as College Principals must be advertised. It is not just individual jobs that have to be advertised Europe wide, when establishments such as Colleges or Local Government need to buy services such as research teams or interventions teams they have to advertised beyond their own country. This is partially due to the funding for these jobs as some of it will come from the European Fund to which each country has to contribute.
Some of the European countries have more jobs and a better market economy than others and this has led to a migration of workers that have moved to where there is better chances of employment and better living conditions. Mainly, it is apparent that the migration tends to follow from Eastern countries towards the Western Countries. Countries in the East of the EU having a poorer economy and poorer standard of living. This has meant that countries in the West of the EU have had an influx of would be workers that have put a strain on their economies as the migrants have taken jobs that would have been taken by natives. This in turn has caused a rise in the unemployment rates, problems for younger people (school leavers in particular) being unable to get employment.
To balance this argument, the workers who have come from EU countries have been willing to take on jobs that many natives to the country would not do or they would not do it for the wage that is being offered. This has caused many problems within employment and market economy.