"Although not one of the five Nobel Prizes established by Alfred Nobel's will in 1895, it is commonly referred to as the Nobel Prize in Economics, and is administered and referred to along with the Nobel Prizes by the Nobel Foundation. Winners of the Prize in Economic Sciences are chosen in a similar manner as and announced alongside the Nobel Prize recipients, and receive the Prize in Economic Sciences at the Nobel Prize Award Ceremony."
It's propaganda for liberalism. It's just that at a certain point that propaganda became so successful, that you sound like a lunatic if you call it propaganda. Unfortunately there was no reason to make propaganda for Mathematics so they never got their own Nobel prize.