Boschma, R.

plant feno values industry externalitie value symptom scores asthma erasmus universiteit rotterdam study agglomeration externalities effect symptom survival agglomeration localization externalities 100.0 model score localization jacob change exacerbation analysis number correlation hazard control cross-correlation subject non-affiliated plants asthma control regression erasmu table fl uctuations rotterdam employment uctuation nitric oxide ics dose march universiteit neffke relatedness downloaded coefficient plant survival variable non-affiliated benefit nitric covariate oxide result estimate 0.0 survival rates analyses children slope municipality asthma severity statistic aalen industry dummies geography urbanization externalities cox model nursery cities model economy parameter relationship hospital economic urbanization sample population pediatrics asthmatic specification