Having an extra day in the year means people will spend more money, but that doesn't mean everybody will earn more.
That's why there's no easy answers when determining the economic impact of Leap Day, which was making its quadrennial appearance Monday.
If every day were indeed equal, then the simplest way to look at it would be to see how it affects total output. The extra day is worth an additional 1/365th of U.S. GDP, or about $50 billion. That's more than the annual GDPs of four states: Montana, South Dakota, Wyoming and Vermont.
But, and this is a big but: Not everything costs more on Leap Day. If you're a salaried worker, then you don't cost more to your employer. Your work is free that day. They pay you the same amount for the year, and you get the privilege of working an extra day. Gee thanks, physics.
The opposite is true for variable and usage-based prices. If you're paid on an hourly or daily basis, then an extra day of work is truly an extra day of pay. (One super small detail for those who care. This year's Feb. 29 pushes Dec. 31 to Saturday, so for the case of 2016, we didn't gain an extra work day).
Now let's look at costs to the consumer: Your cable bill, mortgage, Netflix bill, insurance and any other fixed monthly bill all stay the same, because those are fixed each month. You pay $10 to binge-watch "30 Rock" no matter if there's 31 or 28 days in the month.