The document summarizes the economic aspects of Halloween in the United States. It discusses how much money is spent annually on Halloween activities like costumes, candy, and parties. In particular, it notes that around $9 billion was spent in 2018, with $3 billion going towards candy and $3.2 billion on costumes. Popular costumes include superheroes, animals, and pop culture characters. Halloween parties are also big business, with event organizers doubling or tripling their expected ticket sales and profits.