text: A Harvard Business School case analyzes the role of this commodity in Credem's banking operations in northern Italy.
full_question: A Harvard Business School case analyzes the role of this commodity in Credem's banking operations in northern Italy. A controversy arose in 2014 when the European Union demanded protection for “Geographical Indication" names for different types of this commodity. An Italian miller compared the mixing of earth, air, water, and fire to the creation of this commodity- which subsequently led to the emergence of angels analogized to worms- as related in a Carlo Ginzburg microhistory. Parmigiano-Reggiano is called the "king of," for 10 points, what food, a form of curdled milk?
first_sentence: A Harvard Business School case analyzes the role of this commodity in Credem's banking operations in northern Italy.