What is the author's style in Come Back, Little Sheba by William Inge?

The five-act structure, followed until the nineteenth century, was transformed when Henrik Ibsen (A Doll's House) began to combine elements into fewer acts. Come Back, Little Sheba is a two-act play. The exposition and complication are combined in the first act when the audience learns of Doc and Lola's disappointments, Doc's drinking problem, and Marie's affair with Turk. The climax occurs in the second act when Doc begins to drink again. Doc's drunken return in Scene 2 provides the falling action, and the catastrophe occurs in this act when Doc and Lola are forced to recognize that they must live with the choices they have made and that the past cannot be changed.