John Calabasas has met Erica at least four times now, in several of his business ventures, but still doesn't recognize her or know her name.
Marvin Goldberg's tie had a big face Ben Franklin, which was not available until the 1996 series of the $100 bill... While the show takes place in December 1982 time period.
DuckTales (1987) and the movie Wall Street (1987), both released on 1987, are referenced, as well as a newly-released E.T.: The Extra-Terrestrial (1982), which came out in 1982.
This episode ostensibly takes place in 1982 because the Atari E.T. game is new, yet in the basement there's a replica of Chairry, a character from Pee-Wee's Playhouse, which didn't debut until 1986.
Beverly accuses Erica of "identity theft." Although Erica does commit identity theft by using her mother's name to open a credit-card account, the term "identity theft" was not coined until the mid-1990s at the earliest, and it did not come into common usage until the 2000s.
The TV news reports a slide in value of Atari stock, due to poor reception of the E.T. video game. At the time of the E.T. video game release, Atari was wholly owned by Warner Communications, so there was no publicly traded Atari stock.