-difference estimator using a 59-year-long panel of weather records paired with the fraction of a county that is irrigated in 393 counties … weather shocks in highly irrigated areas are not exogenous but are influenced by human responses in the form of irrigation …

rates and calories varied with economic development. During the 19th century, black physical activity and net nutrition … expectancy was not likely due to improved nutrition. Physically active farmers had greater BMRs and received more calories per … day than workers in other occupations. Black diets, nutrition, and calories varied by residence, and rural blacks in the …

expectancy increased at the same time that nutrition decreased, indicating that the most important source of increased life … expectancy was not improved nutrition. Physically active farmers had greater BMRs and received more calories per day than workers … in other occupations. White diets, nutrition, and calories varied by residence, and whites in the rural Deep South …