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The interplay of factors that affect post-partum loss or retention of weight gained during pregnancy is not fully understood. The objective of this paper is to describe patterns of weight change in the six sites of the World Health Organization (WHO) Multicentre Growth Reference Study (MGRS) and explore variables that explain variation in weight change within and between sites. Mothers of 1743 breastfed children enrolled in the MGRS had weights measured at days 7, 14, 28 and 42 post-partum, monthly from 2 to 12 months and bimonthly thereafter until 24 months post-partum. Height, maternal age, parity and employment status were recorded and breastfeeding was monitored throughout the follow-up. Weight change patterns varied significantly among sites. Ghanaian and Omani mothers lost little or gained weight post-partum. In Brazil, India, Norway and USA, mothers on average lost weight during the first year followed by stabilization in the second year. Lactation intensity and duration explained little of the variation in weight change patterns. In most sites, obese mothers tended to lose less weight than normal-weight mothers. In Brazil and Oman, primiparous mothers lost about 1 kg more than multiparous mothers in the first 6 months. In India and Ghana, multiparous mothers lost about 0.6 kg more than primiparas in the second 6 months. Culturally defined mother-care practices probably play a role in weight change patterns among lactating women. This hypothesis should stimulate investigation into gestational weight gain and post-partum losses in different ethnocultural contexts. [ABSTRACT FROM AUTHOR]

Race-based preferential policies have been employed in the United States and other countries such as Malaysia, South Africa, Brazil, and India to foster economic development among economically marginalized ethnic groups. This research applies a two-player signaling model to help understand labor-market effects of race-based preferential policies used in college admissions. The model shows that in the context of imperfect information in the labor market, purely race-based forms of preferential policies in college admissions are likely to lead to statistical discrimination by future employers, reducing the equilibrium wage of targeted minority groups for both college graduates and non-college graduates. In addition, average wages of the targeted group remain unchanged in the model, with the targeted group being worse off to the extent that educational signaling is costly. In conclusion, the paper argues that race-base preferences cannot substitute for policies and programs that genuinely address imbalances in college preparation between ethnic groups. [ABSTRACT FROM AUTHOR]