Son preference is known to be found in certain types of cultures, that is patrilineal cultures. But what explains the fact that China, South Korea, and Northwest India manifest such extreme child sex ratios compared with other patrilineal societies? This paper argues that what makes these...

China has a large deficit of females, and public policies have sought to reduce the son preference that is widely believed to cause this. Recently a study has suggested that up to 75 percent of this deficit is attributable to hepatitis B infection, indicating that immunization programs should...

"The apparently inexorable rise in the proportion of "missing girls" in much of East and South Asia has attracted much attention amongst researchers and policy-makers. An encouraging trend was suggested by the case of South Korea, where child sex ratios were the highest in Asia but peaked in the...