Outcome: The prediction was right.

Reasoning: In the November 3, 2020 U.S. presidential election, Joe Biden defeated incumbent President Donald Trump, securing both the popular vote and the Electoral College majority, and was inaugurated as the 46th President of the United States on January 20, 2021. This matches Friedberg’s revised prediction (as of July 31, 2020) that Joe Biden would win the November 2020 U.S. presidential election.

Sources: Official U.S. election results and widely reported coverage from major news outlets (e.g., AP, major U.S. networks and newspapers) all confirm Joe Biden’s victory in the 2020 presidential election.