Exactly what are the trades?
The trades, as they are referred to by the industry, are the Daily Variety and the Hollywood Reporter. Both journals are delivered five working days a week. Literally everything a writer needs to know is listed here—from Hollywood gossip and finances, to what is in production, who is doing it, and where. Even productions scheduled for the future are listed. Since both journals cover the same information, it is only necessary to order one.
