""Chapter 5. The analysis for the subcritical parameter""""5.1. Proof of Theorem 2.1""; ""5.2. Proof of Theorem 2.2""; ""5.3. Proof of Theorem 2.3""; ""5.4. Proof of Theorem 2.4""; ""Chapter 6. The analysis for the critical parameter""; ""6.1. Proof of Theorem 2.5""; ""6.2. Proof of Theorem 2.6""; ""6.3. Proof of Theorem 2.7""; ""Chapter 7. Illustration of our results""; ""7.1. On a prototype model""; ""7.2. In other settings""; ""Appendix A. Regular variation theory and related results""; ""A.1. Properties of regularly varying functions""; ""A.2. Other results""; ""Bibliography""