private void generateAutoOwnership() { // select number of cars for every household JobDataManager jobData = new JobDataManager(rb); jobData.calculateJobDensityByZone(); AutoOwnershipModel ao = new AutoOwnershipModel(rb); // calculate auto-ownership probabilities for (Household hh : Household.getHouseholdArray()) { int autos = ao.simulateAutoOwnership(hh); hh.setAutos(autos); } }