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The Impact of Immigration on the New Zealand Labour Market. Paper presented at ‘ Economic Impacts of Immigration and Population Diversity, International Workshop ’ , 11-13 April 2012. Michael Tse & Sholeh A. Maani The University of Auckland Economics Department . Question & Motivation.
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The Impact of Immigration on the New Zealand Labour Market Paper presented at ‘Economic Impacts of Immigration and Population Diversity, International Workshop’, 11-13 April 2012 Michael Tse & Sholeh A. Maani The University of Auckland Economics Department
Question & Motivation • A large segment of the NZ population is foreign-born (almost a quarter). • A key policy question is whether or not immigration affects the labour market opportunities of the existing workforce?
The direction of the impact on existing workers is dependent on a number of factors. These include: Substitutability between immigrants and natives. Are immigrants and the native-born with similar educational qualifications complete substitutes?
Elasticity of substitution If immigrants and natives are substitutes, then the inflow of immigrants would reduce wages in the labour market (Borjas, 2003; Orrenius & Zavodny, 2007) If immigrants complement native workers, then we would expect positive changes to earnings from immigration (Ottaviano & Peri, 2007; Borjas, Grogger & Hanson, 2008)
Immigrant education and experience The value placed on education and experience acquired abroad is often less than the value placed on domestic education and experience (Lalonde & Topel, 1991; Duleep & Regets, 2002; Akresh, 2006; Antecol, Kuhn & Trejo, 2006)
International literature • Altonji & Card 1991 and Borjas 2003: 10 % point increase in fraction of immigrants reduces the wages of less skilled by 3-4 %. • Card 2005, Addison and Worswick 2002 : Mare’ and Stillman 2009, no significant adverse effect
Modelling approaches of wage effects for the native-born • 1. Spatial approach (Card, 1990, 2001, 2005; Altonji & Card, 1991; Dustmann, Fabbri & Preston, 2005). • 2. Factors of production approach • (Borjas, et al., 1996, 1997; Jaeger, 2007Leamer, 2000; Orrenius & Zavodny, 2007, Mare’ and Stillman, 2009). • 3. National level analysis (skill group) (Borjas, 2003, 2004, 2005; Orrenius & Zavodny, 2007).
Data • New Zealand Income Survey (NZIS), 2002 to 2007 • This is an individual level data released under the Confidentialised Unit Record File (CURF) format.
Modelling Approach • National level analysis based on skill and work experience categories • Wage effects of immigrant supply shocks Extensions: • We add spatial regional controls • We incorporate ‘effective immigrant experience’
Immigrant supply shock: Pijt immigrant supply shock M (Immigrant), N(Native-born) ieducational qualification j experience group t year
4 educational categories: • No schooling • School qualification (high-school completion) • Post-school • Bachelor or higher degree
Model • Immigrant shock, fixed-effects and interaction effects on earnings and hours worked: • Pijt immigrant supply shock • ieducational qualification • j experience group • t year
Index of Congruence a native-born b immigrant c occupation (two-digit ) Borjas (2003), Welch (1999)
Results • Immigrant shock, fixed effects and interaction effects: • Pijt immigrant supply shock • ieducational qualification • j experience group • t year
Spatial Correlation • each cell is now defined as (r, i, j, t). That is, each cell is determined by a specific region, education level, experience group, and year.
Defining Effective Experience Let X be the effective experience of an immigrant worker: • A age • Am age at migration • AT age of labour force entry
We estimate the three coefficients above in a standard immigrant assimilation regression of the form: • Ic= 1 immigrant entered as a child • Id= 1 if entry as adult • N native born
a = 0.4 experienceoverseas conversion m = 0.7 experience after migration t = 1.1 experience of child immigrants
Conclusions We extend the standard national level approach to incorporate local government regions in the analysis. • We defining groups by region-education-experience, and it has some impact on the results, but the effect is small.
We adjust for the value firms place on experience acquired abroad, and ‘effective experience’ for each worker. • Based on this experience framework the estimates of wage effects continue to be small.