While it is technically true that Alferd Nobel did not provide for a prize in Economics in his will, there is The Sveriges Riksbank Prize in Economic Sciences (1). This was funded in Nobel's memory by a Swedish central banker.
It is administered by the Nobel Foundation - just like the other prizes.
It is administered by the Nobel Foundation - just like the other prizes.
1 - https://www.nobelprize.org/prizes/economic-sciences/