| Chapter 1. General introduction | 7 |
| Chapter 2. Framework for modelling the cost-effectiveness of systemic interventions aimed to reduce youth delinquency | 15 |
| Chapter 3. Value of information analysis applied to the economic evaluation of interventions aimed at reducing juvenile delinquency: An illustration | 33 |
| Chapter 4. Estimating subgroup effects using the propensity score method: A practical application in outcomes research | 61 |
| Chapter 5. Multisystemic Therapy and Functional Family Therapy compared on their effectiveness using the propensity score method | 89 |
| Chapter 6. General discussion | 139 |
| Addendum Summary | 153 |
| Samenvatting | 157 |
| PhD Portfolio | 163 |
| List of publications | 167 |
| About the Author | 171 |
| Dankwoord | 173 |