I would think the fact that annual bonuses are often paid early in the new year is a big factor in this as well.
I had assumed that March was the common time, such as after perf review feedback is collated
Right, but the reviews take place toward end of year or in January, and it doesn't make sense to go through that process and include employees you're about to fire in the bonus pool.
> December’s above-average layoff numbers often stem from companies trying to adjust costs and reboot in the new year with a new balance sheet.
Not surprising. And basically the answer they give for the headline.
But many many companies don't use a Jan-Dec financial calendar.