Bidwell was interested in the 30-year-old trend of workers jumping from one employer to another multiple times in their careers.

FORBES: Why Promoting From Within Usually Beats Hiring From Outside

"I don't think things will be back to normal for the rest of this year, " said one 35-year-old South Korean manager, who said workers are also stepping out to pay their respects to Mr. Kim.

WSJ: North Korea Opens Some Border Crossings