## Appendix C. CHAID Model in Rules  
**Rules for cat1--contains 21 rules**  
Rule 1: if intervened = 0 and age \(\leq\) 20 and education \(\leq\) 2 then cat1  
Rule 2: if intervened = 0 and age \(\leq\) 20 and education \(>\) 2 and education \(\leq\) 4 then cat1  
Rule 3: if intervened = 0 and age \(\leq\) 20 and education \(>\) 4 and cumulative \(\leq\) 183 then cat1  
Rule 4: if intervened = 0 and age \(\leq\) 20 and education \(>\) 4 and cumulative \(>\) 183 then cat1  
Rule 5: if intervened = 0 and age \(>\) 20 and age \(\leq\) 24 and average unemployment \(\leq\) 7.593 and education \(\leq\) 6 then cat1  
Rule 6: if intervened = 0 and age \(>\) 20 and age \(\leq\) 24 and average unemployment \(\leq\) 7.593 and education \(>\) 6 then cat1  
Rule 7: if intervened = 0 and age \(>\) 20 and age \(\leq\) 24 and average unemployment \(>\) 7.593 and average unemployment \(\leq\) 25.657 then cat1  
Rule 8: if intervened = 0 and age \(>\) 20 and age \(\leq\) 24 and average unemployment \(>\) 25.657 and average unemployment \(\leq\) 77.935 and n_previous_noninterventions = 0 then cat1  
Rule 9: if intervened = 0 and age \(>\) 20 and age \(\leq\) 24 and average unemployment \(>\) 25.657 and average unemployment \(\leq\) 77.935 and n_previous_noninterventions > 0 then cat1  
Rule 10: if intervened = 0 and age \(>\) 20 and age \(\leq\) 24 and average unemployment \(>\) 77.935 then cat1  
Rule 11: if intervened = 0 and age \(>\) 24 and age \(\leq\) 28 and average unemployment \(\leq\) 15.711 and education \(\leq\) 7 then cat1  
Rule 12: if intervened = 0 and age \(>\) 24 and age \(\leq\) 28 and average unemployment \(\leq\) 15.711 and education \(>\) 7 then cat1  
Rule 13: if intervened = 0 and age \(>\) 24 and age \(\leq\) 28 and average unemployment \(>\) 15.711 and average unemployment \(\leq\) 37.968 then cat1  
Rule 14: if intervened = 0 and age \(>\) 24 and age \(\leq\) 28 and average unemployment \(>\) 37.968 and cumulative \(>\) 0 then cat1  
Rule 15: if intervened = 0 and age \(>\) 28 and age \(\leq\) 32 and n_previous_noninterventions \(\leq\) 0 and average unemployment \(\leq\) 37.968 then cat1  
Rule 16: if and intervened = 0 and age \(>\) 28 and age \(\leq\) 32 and n_previous_noninterventions \(>\) 0 then cat1  
Rule 17: if intervened = 0 and age \(>\) 32 and age \(\leq\) 42 and n_previous_noninterventions \(>\) 0 and cumulative \(\leq\) 183 then cat1  
Rule 18: if intervened = 0 and age \(>\) 32 and age \(\leq\) 42 and n_previous_noninterventions \(>\) 0 and cumulative \(>\) 183 then cat1  
Rule 19: if intervened = 0 and age \(>\) 42 and age \(\leq\) 48 and n_previous_noninterventions \(>\) 0 then cat1  
Rule 20: if and intervened = 0 and age \(>\) 48 and age \(\leq\) 54 and n_previous_registrations \(>\) 0 then cat1  
Rule 21: if intervened = 1 and n_previous_interventions \(\leq\) 0 and works_before_registration \(>\) 361 and works_before_registration \(\leq\) 1 499 then cat1  
**Rules for cat2--contains five rules**  
Rule 1: if intervened = 1 and n_previous_interventions \(\leq\) 1 and works_before_registration \(\leq\) 19 then cat2  
Rule 2: if intervened = 1 and n_previous_interventions \(\leq\) 1 and works_before_registration \(>\) 19 then cat2  
Rule 3: if intervened = 1 and n_previous_interventions \(>\) 1 and n_previous_interventions \(\leq\) 2 then cat2  
Rule 4: if intervened = 1 and n_previous_interventions \(>\) 2 and n_previous_interventions \(\leq\) 4 then cat2  
Rule 5: if intervened = 1 and n_previous_interventions \(>\) 4 then cat2  
**Rules for cat3--contains 25 rules**  
Rule 1: if dis3 = 1 and n_previous_registrations \(\leq\) 1 and works_before_registration = 0 and marital_status = 0 or 1 then cat3  
Rule 2: if dis3 = 1 and n_previous_registrations \(\leq\) 1 and works_before_registration = 0 and marital_status = 2 or 3 or 4 then cat3  
Rule 3: if dis3 = 1 and n_previous_registrations \(\leq\) 1 and works_before_registration \(>\) 361 and works_before_registration \(\leq\) 1 499 then cat3  
Rule 4: if dis3 = 1 and n_previous_registrations \(\leq\) 1 and works_before_registration \(>\) 1 499 then cat3  
Rule 5: if dis3 = 1 and n_previous_registrations \(>\) 1 and works_before_registration \(\leq\) 1 then cat3  
Rule 6: if dis3 = 1 and n_previous_registrations \(>\) 1 and works_before_registration \(\leq\) 1 then cat3  
Rule 7: if intervened = 0 and age \(>\) 24 and age \(\leq\) 28 and average unemployment \(>\) 37.968 and cumulative \(\leq\) 0 then cat3  
Rule 8: if intervened = 0 and age \(>\) 28 and age \(\leq\) 32 and n_previous_nonterventions \(\leq\) 0 and average unemployment \(>\) 37.968 then cat3  
Rule 9: if and intervened = 0 and age \(>\) 32 and age \(\leq\) 42 and n_previous_nonterventions \(\leq\) 0 and average unemployment \(\leq\) 25.657 then cat3  
Rule 10: if intervened = 0 and age \(>\) 32 and age \(\leq\) 42 and n_previous_nonterventions \(\leq\) 0 and average unemployment \(>\) 25.657 and average unemployment \(\leq\) 77.935 then cat3  
Rule 24: if intervened = 1 and n_previous_interventions = 0 and works_before_registration \(>\) 19 and works_before_registration \(\leq\) 361 then cat3  
Rule 25: if intervened = 1 and n_previous_interventions = 0 and works_before_registration \(>\) 1 499 then cat3  
**Rules for cat4--contains 12 rules**  
Rule 1: if dis3 = 1 and n_previous_registrations = 0 and intervened = 0 and age \(\leq\) 24 then cat4  
Rule 2: if dis3 = 1 and n_previous_registrations = 0 and intervened = 0 and age \(>\) 24 and age \(\leq\) 54 and works_before_registration = 0 then cat4  
Rule 3: if dis3 = 1 and n_previous_registrations = 0 and intervened = 0 and age \(>\) 24 and age \(\leq\) 54 and and works_before_registration \(\leq\) 1 then cat4  
Rule 4: if dis3 = 1 and n_previous_registrations = 0 and intervened = 0 and age \(>\) 24 and age \(\leq\) 54 and works_before_registration \(>\) 1 and works_before_registration \(\leq\) 361 then cat4  
* [PERSON] and [PERSON] (2018) [PERSON]; [PERSON] The Determinants of Youth Unemployment: A Panel Data Analysis of OECD Countries.