Duke University Press

Table 1

Decomposition of trends in earnings inequality (Gini) between couples due to changes in earnings homogamy

	Observed		Standardized 2013	Observed Change	Standardized Change	Contribution (%)
	1988	2013	Standardized 2013	Observed Change	Standardized Change	Contribution (%)
	A1	A2	B	C (= A2 – A1)	D (= B – A1)	E (= (C – D) /C)
a. Total
	.1451	.3102	.2999	.1651	.1549^*	6.20
b. Husband's Earnings Decile						E_k (= (C – D) / (0.1651 – 0.1549))
1	.0183	.0338	.0350	.0156	.0167^†	−10.98
2	.0138	.0276	.0276	.0138	.0138	−0.03
3	.0122	.0246	.0250	.0124	.0128	−3.94
4	.0115	.0237	.0232	.0121	.0117	4.21
5	.0110	.0229	.0225	.0119	.0115	3.50
6	.0113	.0239	.0233	.0126	.0112^†	6.18
7	.0116	.0252	.0240	.0135	.0124^*	11.27
8	.0127	.0292	.0270	.0165	.0143^*	22.07
9	.0157	.0368	.0351	.0212	.0194^†	17.26
10	.0269	.0625	.0573	.0355	.0304^*	50.44

	Observed		Standardized 2013	Observed Change	Standardized Change	Contribution (%)
	1988	2013	Standardized 2013	Observed Change	Standardized Change	Contribution (%)
	A1	A2	B	C (= A2 – A1)	D (= B – A1)	E (= (C – D) /C)
a. Total
	.1451	.3102	.2999	.1651	.1549^*	6.20
b. Husband's Earnings Decile						E_k (= (C – D) / (0.1651 – 0.1549))
1	.0183	.0338	.0350	.0156	.0167^†	−10.98
2	.0138	.0276	.0276	.0138	.0138	−0.03
3	.0122	.0246	.0250	.0124	.0128	−3.94
4	.0115	.0237	.0232	.0121	.0117	4.21
5	.0110	.0229	.0225	.0119	.0115	3.50
6	.0113	.0239	.0233	.0126	.0112^†	6.18
7	.0116	.0252	.0240	.0135	.0124^*	11.27
8	.0127	.0292	.0270	.0165	.0143^*	22.07
9	.0157	.0368	.0351	.0212	.0194^†	17.26
10	.0269	.0625	.0573	.0355	.0304^*	50.44

Note: Significance levels (H₀: C – D = 0) are based on bootstrapping of 100 replications.

^†p < .10; ^*p < .05