The Needs of the Army
利用军队调动导致家庭搬迁这一外生变化，识别空气污染对儿童呼吸系统住院的因果影响，发现臭氧对学龄儿童健康有不利影响。
Abstract Recent research suggests that pollution has a large impact on asthma and other respiratory and cardiovascular conditions. But this relationship and its implications are not well understood. I use changes in location due to military transfers, which occur entirely to satisfy the needs of the army, to identify the causal impact of pollution on children's respiratory hospitalizations. I use individual-level data of military families and their dependents, matched at the zip code level with pollution data, for the period 1989–95. I find that for military children only ozone appears to have an adverse effect on health, although not for infants.