Using regression analysis, Addison and Worswick found in a 2002 study that "there is no evidence that immigration has negatively impacted on the wages of young or low-skilled natives." Furthermore, Addison's study found that immigration did not increase unemployment among native workers. Rather, immigration decreased unemployment.Addison, T. and Worswick, C. (2002). The impact of immigration on the earnings of natives: Evidence from Australian micro data. , Vol. 78, pp. 68–78. However, in 2005 the Productivity Commission concluded that higher immigration levels would result in lower wage growth for existing Australian residents. On the impact of immigration on unemployment levels, the Commission said: "The conclusion that immigration has not caused unemployment at an aggregate level does not imply that it cannot lead to higher unemployment for specific groups. Immigration could worsen the labour market outcomes of people who work in sectors of the economy that have high concentrations of immigrant workers."
