“Paul? It’s Bob Wilson,” he said, knocking on his door several times.
“You’ve won the Nobel Prize so they’re trying to reach you, but they cannot. They don’t seem to have a number for you.”
“Wow,” he can be heard responding.
The two laureates received the Nobel Prize in economic science for their work on auction theory and will share a cash prize of 10 million Swedish kronor (around £875,700).
They were recognised for “improvements to auction theory and inventions of new auction formats.”
“Their discoveries have benefitted sellers, buyers, and taxpayers around the world,” the prize committee said.
Mr Milgrom, 72, was raised in a Jewish family in Detroit, according to the Jewish Telegraphic Agency.