It is a rare bread of people who really understand the economy and its complex machinations. These speakers do, and they also understand the word 'machinations'.
A professional economic speaker can give you a rare insight into the theories and concepts of finance and economics and also forecast potential economic futures as well as break down past trends.
An Economist can analyse local and world business information and put together an objective opinion of what your industry looks like and how other industries around you affect your organisation. There is no better way to make sure that you can understand this complex area other than having an economist present for your event or conference.