Caitlin Knowles Myers

Cues for Timing and Coordination: Latitude, Letterman, and Longitude

Daylight, television schedules, and time zones can alter timing and induce temporal coordination of economic activities. With the American Time Use Survey for 2003–2004 and data from Australia for 1992, we show that television schedules and the locations of time zones affect the timing of market work and sleep, with differences in timing being generated partly by returns to coordination with other agents. The responsiveness to time zone differences is greatest among workers in industries in national markets. An exogenous shock resulting from an area’s nonadherence to daylight saving time leads its residents to alter work schedules to coordinate with people elsewhere.

Two Food-Assisted Maternal and Child Health Nutrition Programs Helped Mitigate the Impact of Economic Hardship on Child Stunting in Haiti

Rigorous evaluations of food-assisted maternal and child health and nutrition programs are stymied by the ethics of randomizing recipients to a control treatment. Using nonexperimental matching methods, we evaluated the effect of 2 such programs on child linear growth in Haiti. The 2 well-implemented programs offered the same services (food assistance, behavior change communication, and preventive health services) to pregnant and lactating women and young children. They differed in that one (the preventive program) used blanket targeting of all children 6-23 mo, whereas the other (the recuperative program) targeted underweight (weight-for-age Z score < -2) children 6-59 mo, as traditionally done. We estimated program effects on height-for-age Z scores (HAZ) and stunting (HAZ < -2) by comparing outcomes of children in program areas with matched children from comparable populations in the Haiti Demographic and Health Survey. Children 12-41 mo in the preventive and recuperative program areas had lower prevalence of stunting than those in the matched control group [16 percentage points (pp) lower in preventive and 11 pp in recuperative]. Children in the 2 program areas also were more likely than those in the matched control group to be breast-fed up to 24 mo (25 pp higher in preventive, 22 in recuperative) and children 12 mo and older were more likely to have received the recommended full schedule of vaccinations (32 pp higher in preventive, 31 in recuperative). Both programs improved targeted behaviors and protected child growth in a time of deteriorating economic circumstances.

Ladies first? A field study of discrimination in coffee shops.

Despite anecdotal and survey evidence suggesting the presence of discrimination against customers in stores, restaurants and other small-transaction consumer markets, few studies exist that identify or quantify the nature of any unequal treatment. We provide evidence from a field study of wait times in Boston-area coffee shops that suggests that female customers wait an average of 20 seconds longer for their orders than do male customers even when controlling for gender differences in orders. We find that this differential in wait times is inverse to the proportion of employees who are female and directly related to how busy the coffee shop is at the time of the order. This supports the conclusion that the observed differential is driven at least in part by employee animus and/or statistical discrimination rather than unobserved heterogeneity in the purchasing behaviour of female customers.

Prenatal Testosterone and the Earnings of Men and Women

Testosterone, which induces sexual differentiation of the male fetus, is believed to transfer from males to their littermates in placental mammals. Among humans, individuals with a male twin have been found to exhibit greater masculinization of sexually dimorphic attributes relative to those with a female twin. We therefore regard twinning as a plausible natural experiment to test the link between prenatal exposure to testosterone and labor market earnings. For men, the results suggest positive returns to testosterone exposure. For women, however, the results indicate that prenatal testosterone does not generate higher earnings and may even be associated with modest declines.

Retail Redlining: Are Gasoline Prices Higher in Poor and Minority Neighborhoods?

Higher retail prices are frequently cited as a cost of living in poor, minority neighborhoods. However, the empirical evidence, which primarilycomes from the grocery gap literature on food prices, has been mixed. This study uses new data on retail gasoline prices in three major U.S.cities to provide evidence on the relationship between neighborhood characteristics and consumer prices. We find that gasoline prices do not varygreatly with neighborhood racial composition, but that prices are higher in poor neighborhoods. For a 10 percentage point increase in the percentof families with incomes below the poverty line relative to families with incomes between 1 and 2 times the poverty line, retail gasoline prices are estimated to increase by an average of 0.70 percent. This differential is reduced to 0.22 percent once we add controls for costs, competition, and demand. Finally, we provide evidence that the remaining, small, price differential for poor neighborhoods is likely the result of traditional price discrimination in response to less competition and/or more inelastic demand in these locations.