Naturalisation and on-the-job training: evidence from first-generation immigrants in Germany

von Haaren-Giebel, Friederike; Sandner, Malte

doi:10.1186/s40176-016-0067-x

Table 11 Matching quality indicators—two

From: Naturalisation and on-the-job training: evidence from first-generation immigrants in Germany

Variable	Sample	Mean		Standardised difference	Percentage reduction in standardised differences	t test
Variable	Sample	Treated	Control	Standardised difference	Percentage reduction in standardised differences	t	p > \|t\|
Gender	Unmatched	0.48	0.39	18.20		9.330	0.000
Gender	Matched	0.48	0.49	−1.50	91.60	−0.530	0.600
Years since migration	Unmatched	2.52	2.08	50.20		26.640	0.000
Years since migration	Matched	2.52	2.29	25.70	48.90	8.380	0.000
Origin: Eastern Europe	Unmatched	0.50	0.24	55.80		30.150	0.000
Origin: Eastern Europe	Matched	0.49	0.48	2.90	94.90	0.920	0.355
Origin: Turkey	Unmatched	0.21	0.31	−23.40		−11.390	0.000
Origin: Turkey	Matched	0.21	0.15	13.00	44.50	5.110	0.000
Origin: other countries	Unmatched	0.21	0.03	59.10		43.180	0.000
Origin: other countries	Matched	0.22	0.26	−15.50	73.90	−3.930	0.000
Married to a German citizen	Unmatched	0.61	0.13	116.70		66.030	0.000
Married to a German citizen	Matched	0.60	0.63	−7.10	93.90	−2.120	0.034
Position in the job: medium	Unmatched	0.50	0.30	41.70		21.820	0.000
Position in the job: medium	Matched	0.49	0.45	9.40	77.40	3.150	0.002
Position in the job: high	Unmatched	0.13	0.04	33.00		20.790	0.000
Position in the job: high	Matched	0.13	0.18	−17.50	47.00	−4.710	0.000
Firm size: 20–200	Unmatched	0.27	0.29	−4.90		−2.420	0.016
Firm size: 20–200	Matched	0.26	0.28	−2.90	41.30	−1.010	0.314
Firm size: 200–2000	Unmatched	0.26	0.30	−8.50		−4.160	0.000
Firm size: 200–2000	Matched	0.27	0.25	4.00	52.70	1.430	0.154
Firm size: more than 2000	Unmatched	0.23	0.22	0.50		0.230	0.821
Firm size: more than 2000	Matched	0.23	0.23	−0.40	10.60	−0.140	0.888
Blue-collar worker	Unmatched	0.51	0.81	−68.70		−38.330	0.000
Blue-collar worker	Matched	0.51	0.49	6.40	90.60	2.000	0.046
Period: 1990–1993	Unmatched	0.14	0.22	−20.50		−9.810	0.000
Period: 1990–1993	Matched	0.15	0.10	13.20	35.70	5.200	0.000
Period: 1997–1999	Unmatched	0.12	0.10	6.10		3.180	0.001
Period: 1997–1999	Matched	0.12	0.10	6.50	−6.00	2.210	0.027
Period: 2000–2004	Unmatched	0.23	0.16	17.60		9.420	0.000
Period: 2000–2004	Matched	0.24	0.29	−13.90	20.80	−4.320	0.000
Period: 2005–2008	Unmatched	0.15	0.08	20.20		11.300	0.000
Period: 2005–2008	Matched	0.15	0.19	−12.40	38.80	−3.700	0.000

Notes: Output generated using \( 100\cdot \left({\overline{X}}_1-{\overline{X}}_0\right)/\sqrt{0.5\cdot \left({V}_1(X)+{V}_0(X)\right)} \) STATA program pstest after psmatch2 by Leuven and Sianesi (2013). The standard difference of covariates across the two groups is equal to where V ₁ is the variance in the treatment group and V ₀ the variance for the control group (Rosenbaum and Rubin 1985)
Source: SOEP v26, own calculations

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