Working women or dual-income households in South Korea have fewer children on average than households with a single breadwinner, as child care is disproportionately also done by women, reports showed Monday. Based on household surveys of partners aged 25 to 44, dual-income households had an average of 1.36 children while single-income households had 1.46 children last year, according to Statistics Korea's study of fertility disparities based on economic and social factors. Elite families with a