Table 1

Summary Statistics

	Observations	Mean	Standard deviation	Minimum	Maximum
Nutrition indicators
Calorie intake	10,718	2,346	719.9	337	8,777
Protein intake	10,707	67.7	22.7	5.3	193.1
Calorie intake (men)	10,101	2,676	803.4	206	8,556
Protein intake (men)	10,075	77.9	25.6	4.5	199.5
Health indicators
BMI	10,690	22.41	2.867	9.50	34.63
Underweight	10,690	0.197	0.397	0	1
Overweight	10,690	0.181	0.385	0	1
Obese	10,690	0.011	0.106	0	1
Other variables
Age	10,718	37.6	6.37	18.3	65.2
Age (men)	10,101	39.5	7.0	19.3	72.6
Years of education	10,718	6.573	4.700	0	18
Years of education (men)	10,101	8.470	3.993	0	18
Ethnic Han	10,718	0.855	0.352	0	1
Living in rural area	10,718	0.746	0.435	0	1
Household per capita income (10k RMB)	10,718	0.387	0.432	−0.360	14.887
Mother has given birth to a boy	10,718	0.773	0.419	0	1
First child is a boy	10,718	0.508	0.500	0	1
Household size	10,718	4.505	1.251	2	13
Days of working per week	4,845	5.034	2.931	0	7
Hours of working per day	4,834	6.614	3.913	0	18
Transfer from parents (RMB/year)	4,601	27.61	413.23	0	20,000

Source: CHNS 1993, 1997, 2000, 2004, and 2006.
Note: Unless specially noted, these summary statistics are for women. Data on transfers from parents is only available in 2000, 2004, and 2006.