Table A1.

Estimated Exchange Indexes by the focal spouse’s status quintile groups in the two analytical examples of status-race and status-age exchange in marriage

	Analytical Example 1: Status-race exchange					Analytical Example 2: Status-age exchange
	$\mathit{E}{\mathit{I}}_{\mathit{H}}\mathbf{ }({\mathit{G}}_{\mathit{H}}\mathbf{ }=\mathbf{ }\mathit{b}\mathit{l}\mathit{a}\mathit{c}\mathit{k},\mathbf{ }{\mathit{G}}_{\mathit{W}}=\mathbf{ }\mathit{w}\mathit{h}\mathit{i}\mathit{t}\mathit{e})$					$\mathit{E}{\mathit{I}}_{\mathit{H}}\mathbf{ }({\mathit{G}}_{\mathit{H}}\mathbf{ }-\mathbf{ }{\mathit{G}}_{\mathit{W}}\mathbf{ }>\mathbf{ }4)$
Husband’s status quintiles	Coef.	s.e.	CI(lower)	CI(upper)	N	Coef.	s.e.	CI(lower)	CI(upper)	N
80–100	−0.850	0.667	−2.158	0.457	12693	−1.714	0.129	−1.967	−1.461	212654
60–79	−2.944	0.691	−4.299	−1.589	12371	0.436	0.164	0.115	0.757	145162
40–59	−2.888	0.834	−4.523	−1.253	9578	1.030	0.181	0.676	1.384	106643
20–39	−1.166	0.436	−2.021	−0.311	36085	1.870	0.085	1.704	2.036	369655
0–19	2.427	1.236	0.003	4.851	3039	3.238	0.147	2.950	3.526	108374
	$E{I}_W(G_H=\mathit{\text{black}},G_W=\mathit{\text{white}})$					$EI\_W(G_H-G_W>4)$
Wife’s status quintiles	Coef.	s.e.	CI(lower)	CI(upper)	N	Coef.	s.e.	CI(lower)	CI(upper)	N
80–100	−0.259	0.547	−1.332	0.813	151353	−2.990	0.097	−3.181	−2.800	249858
60–79	1.018	0.869	−0.685	2.720	57611	−0.044	0.171	−0.379	0.290	86487
40–59	0.645	0.600	−0.532	1.821	95590	0.504	0.130	0.250	0.759	141238
20–39	1.334	0.378	0.594	2.074	252415	2.065	0.074	1.920	2.210	375627
0–19	5.381	0.968	3.484	7.278	12533	3.778	0.138	3.507	4.049	100344