The Friday File: Since the start of CY2019, the KC Chiefs have played 20 games when the moon is a waxing crescent, a growing toenail sliver. And of those 20 games they have won 19. By contrast the 49ers are 15-15 in the last 30 waxing crescent games they have played. Lunar analysis says the Chiefs will win. The economist in me is overwhelmed at the correlation. As for causality…