Roll out half the dough on a lightly floured sheet of parchment paper to 1/4-inch thickness (about a 12-inch circle). Fit into a 9-inch pie plate, crimping edges as desired. Refrigerate 30 minutes to 1 hour. Preheat oven to 365 degrees F. Cut butter into 3/4 cup flour, sugar, and cinnamon. Add pears and cranberries, stirring to coat. Pour into prepared crust. Top evenly with pecan mixture. Place on an aluminum foil-lined rimmed baking sheet. Bake at 365 degrees F for 70 minutes, or until bubbly and golden brown. Let cool completely on a wire rack.