The Foundation uses the longer name when being formal, but regularly includes the Economics Prize as a 'Nobel Prize' in headers & lists - such as their top-leve

The Foundation uses the longer name when being formal, but regularly includes the Economics Prize as a 'Nobel Prize' in headers & lists - such as their top-level menu 'Nobel Prizes' (which includes the 'Prize in Economic Sciences'), and their master list of 'Nobel Prize laureates'. So headlines calling it a 'Nobel' match the Nobel Foundation's usage in similar summary/header contexts.