<P> Trade unions have been accused of benefiting insider workers, those having secure jobs, at the cost of outsider workers, consumers of the goods or services produced and the shareholders of the unionized business . </P> <P> In the United States, the outsourcing of labour to Asia, Latin America, and Africa has been partially driven by increasing costs of union partnership, which gives other countries a comparative advantage in labour, making it more profitable to purchase disorganized, low - wage labour from these regions . Milton Friedman, economist and advocate of laissez - faire capitalism, sought to show that unionization produces higher wages (for the union members) at the expense of fewer jobs, and that, if some industries are unionized while others are not, wages will tend to decline in non-unionized industries . </P> <P> On the other hand, several studies have emphasized so - called revitalization strategies where trade unions attempt to better represent labour market outsiders, such as the unemployed and precarious workers . Thus, for instance, trade unions in both Nordic and southern European countries have devised collective bargaining agreements that improved the conditions of temporary agency workers . </P> <P> Several sources of current news exist about the trade union movement in the world . These include LabourStart and the official website of the international trade union movement Global Unions . A source of international news about unions is RadioLabour which provides daily (Monday to Friday) news reports . </P>

Discuss the growth and development of trade union in nigeria