摘要: A Poisson specification of the relationship between atmospheric pollution and lost work days is estimated. An important feature procedure control for city-specific effects. major source ambiguity in interpreting results observational data on versus health status or death rates that a city may be correlated with other characteristics affect these outcomes but are not controlled analysis. Or, individual attributes residents levels accounted The suggest statistically significant quantitatively effect total suspended particulates lost. standard deviation increase associated approximately ten percent analysis, also finds substantial smoking by others indivual's household non-smokers. 34 references, 4 tables.