New York Lottery officials said Friday's lucky date -- 11/11/11 -- produced a spike in lottery ticket sales.

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Officials said ticket sales have sharply increased. Carolyn Hapeman, spokeswoman for the New York Lottery, said the Win4 drawing caps sales on number combinations at $5 million and the 1-1-1-1 combination sold out a week prior to Friday's drawing, CNNMoney reported Friday.

David Just, associate professor of economics at Cornell University, said it is not unusual to see ticket sales increase for dates seen to have a special meaning.

"There are a large number of people who sit on the sidelines and wait to jump in when they see a big jackpot or for dates like this," Just said. "You might see a 5 percent to 10 percent bump (in sales)."

Just said a similar spike was seen July 7, 2007 -- 7/7/07.