In " A Doll House by Henrik Ibsen list what each character calls the other characters. What is the significance of the nicknames Torvald has for Nora?...

In " A Doll House by Henrik Ibsen list what each character calls the other characters. What is the significance of the nicknames Torvald has for Nora? What is the effect of the use of titles and of last names alone (Doctor versus Rank, Mrs. Linde versus Kristine, Nils as opposed to Krogstad)? How do these names reflect the relationships between characters?