Homogamy Indicators Based on Forces of Attraction with Age Group of Five, 1960-2005.

Marriage Cohort	Raw	Equal Weights					Varying Weights
		Adjacent 3 cohorts	5 cohorts	7 cohorts	9 cohorts	11 cohorts	Adjacent 3 cohorts	5 cohorts	7 cohorts	9 cohorts	11 cohorts
1960	0.3727	0.3633	0.3716	0.3742	0.3758	0.3814	0.3664	0.3690	0.3711	0.3726	0.3751
1961	0.3538	0.3716	0.3742	0.3758	0.3814	0.3862	0.3671	0.3707	0.3726	0.3754	0.3783
1962	0.3882	0.3747	0.3758	0.3814	0.3862	0.3888	0.3780	0.3768	0.3786	0.3810	0.3831
1963	0.3820	0.3841	0.3831	0.3862	0.3888	0.3900	0.3836	0.3833	0.3846	0.3860	0.3871
1964	0.3822	0.3912	0.3953	0.3910	0.3900	0.3966	0.3890	0.3925	0.3919	0.3912	0.3927
1965	0.4095	0.4022	0.3991	0.3976	0.3992	0.4003	0.4040	0.4013	0.3997	0.3995	0.3998
1966	0.4148	0.4104	0.4026	0.4073	0.4086	0.4073	0.4115	0.4066	0.4069	0.4075	0.4074
1967	0.4068	0.4071	0.4174	0.4153	0.4154	0.4169	0.4070	0.4128	0.4139	0.4144	0.4152
1968	0.3997	0.4208	0.4230	0.4249	0.4239	0.4213	0.4156	0.4197	0.4220	0.4227	0.4223
1969	0.4560	0.4312	0.4301	0.4320	0.4300	0.4301	0.4374	0.4333	0.4327	0.4317	0.4312
1970	0.4379	0.4479	0.4404	0.4351	0.4377	0.4376	0.4454	0.4426	0.4393	0.4387	0.4384
1971	0.4499	0.4488	0.4478	0.4454	0.4432	0.4455	0.4491	0.4484	0.4471	0.4457	0.4456
1972	0.4587	0.4484	0.4524	0.4546	0.4533	0.4512	0.4510	0.4518	0.4530	0.4531	0.4525
1973	0.4366	0.4581	0.4577	0.4605	0.4619	0.4608	0.4527	0.4555	0.4577	0.4592	0.4597
1974	0.4788	0.4599	0.4672	0.4662	0.4682	0.4712	0.4646	0.4660	0.4661	0.4669	0.4682
1975	0.4643	0.4802	0.4709	0.4751	0.4766	0.4755	0.4762	0.4733	0.4741	0.4750	0.4751
1976	0.4973	0.4798	0.4861	0.4829	0.4826	0.4829	0.4842	0.4852	0.4842	0.4836	0.4834
1977	0.4777	0.4958	0.4930	0.4926	0.4892	0.4921	0.4912	0.4922	0.4924	0.4912	0.4915
1978	0.5123	0.5011	0.5010	0.4982	0.5019	0.4993	0.5039	0.5023	0.5005	0.5010	0.5005
1979	0.5134	0.5099	0.5052	0.5106	0.5085	0.5069	0.5108	0.5077	0.5090	0.5088	0.5082
1980	0.5040	0.5120	0.5198	0.5164	0.5148	0.5118	0.5100	0.5155	0.5159	0.5155	0.5144
1981	0.5186	0.5245	0.5250	0.5226	0.5186	0.5139	0.5230	0.5241	0.5235	0.5217	0.5193
1982	0.5509	0.5359	0.5265	0.5254	0.5197	0.5165	0.5396	0.5323	0.5293	0.5258	0.5230
1983	0.5382	0.5366	0.5321	0.5217	0.5213	0.5214	0.5370	0.5343	0.5288	0.5261	0.5246
1984	0.5207	0.5303	0.5258	0.5248	0.5233	0.5232	0.5279	0.5268	0.5259	0.5250	0.5244
1985	0.5321	0.5134	0.5209	0.5268	0.5264	0.5234	0.5180	0.5196	0.5228	0.5241	0.5239
1986	0.4873	0.5152	0.5197	0.5240	0.5261	0.5252	0.5082	0.5146	0.5187	0.5214	0.5225
1987	0.5262	0.5152	0.5219	0.5209	0.5230	0.5237	0.5180	0.5201	0.5205	0.5214	0.5221
1988	0.5322	0.5300	0.5187	0.5212	0.5191	0.5202	0.5305	0.5240	0.5228	0.5214	0.5211
1989	0.5316	0.5267	0.5258	0.5170	0.5182	0.5180	0.5279	0.5267	0.5225	0.5209	0.5200
1990	0.5162	0.5235	0.5211	0.5206	0.5162	0.5163	0.5217	0.5214	0.5210	0.5193	0.5184
1991	0.5229	0.5139	0.5172	0.5188	0.5178	0.5154	0.5162	0.5167	0.5177	0.5177	0.5170
1992	0.5028	0.5127	0.5136	0.5145	0.5173	0.5186	0.5102	0.5121	0.5132	0.5147	0.5159
1993	0.5126	0.5097	0.5108	0.5132	0.5162	0.5185	0.5104	0.5106	0.5117	0.5133	0.5149
1994	0.5137	0.5094	0.5106	0.5140	0.5155	0.5174	0.5105	0.5106	0.5121	0.5133	0.5146
1995	0.5019	0.5126	0.5145	0.5144	0.5160	0.5163	0.5099	0.5125	0.5133	0.5143	0.5149
1996	0.5222	0.5154	0.5171	0.5169	0.5156	0.5148	0.5171	0.5171	0.5170	0.5165	0.5160
1997	0.5220	0.5233	0.5183	0.5179	0.5153	0.5134	0.5230	0.5204	0.5193	0.5179	0.5165
1998	0.5255	0.5225	0.5219	0.5159	0.5147	0.5133	0.5233	0.5225	0.5196	0.5179	0.5165
1999	0.5201	0.5218	0.5174	0.5167	0.5133	0.5141	0.5214	0.5192	0.5181	0.5164	0.5157
2000	0.5199	0.5132	0.5145	0.5136	0.5155	0.5113	0.5148	0.5147	0.5142	0.5147	0.5136
2001	0.4996	0.5090	0.5096	0.5136	0.5111	0.5122	0.5067	0.5083	0.5106	0.5108	0.5112
2002	0.5076	0.5027	0.5100	0.5075	0.5097	0.5111	0.5039	0.5073	0.5074	0.5081	0.5089
2003	0.5009	0.5101	0.5025	0.5054	0.5075	0.5097	0.5078	0.5048	0.5050	0.5058	0.5069
2004	0.5219	0.5017	0.5032	0.5025	0.5054	0.5075	0.5068	0.5050	0.5040	0.5044	0.5052
2005	0.4823	0.5021	0.5017	0.5032	0.5025	0.5054	0.4955	0.4986	0.5004	0.5011	0.5023

Note: Homogamy indicators are constructed by the forces of attraction based on age groups of five years. Specifically, we divide individuals into age groups 15-19, 20-24, 25-29, 30-35, 36-40 and 41-50. Moving averages are calculated to smooth the trend, and are computed respectively with equal and varying weights for the adjacent 3, 5, 7, 9 and 11 marriage cohorts. For those with three adjacent cohorts, weights applied are respectively ¼, ½ and ¼; for those with five adjacent cohorts, weights applied are respectively 1/9, 2/9, 1/3, 2/9 and 1/9; for those with seven adjacent cohorts, weights applied are respectively 1/16, 1/8, 3/16, 1/4, 3/16, 1/8 and 1/16; for those with nine adjacent cohorts, weights applied are respectively 1/25, 2/25, 3/25, 4/25, 1/5, 4/25, 3/25, 2/25 and 1/25; for those with eleven adjacent cohorts, weights applied are respectively 1/36, 1/18, 1/12, 1/9, 5/36, 1/6, 5/36, 1/9, 1/12, 1/18 and 1/36.

Source: China 2005 1% Population Inter-census Survey.