The economist passed away at the Princess Margaret Hospital in Dominica’s capital, Roseau.
Prime Minister Roosevelt Skerrit says Dr Yankey’s death marks the loss of “a great citizen who selflessly gave so much of his intellect and knowledge towards the development of Dominica and the Caribbean”.
The diplomat served in several posts at home and in other parts of the region.
He was a former High Commissioner of the Organisation of Eastern Caribbean States (OECS) to Canada, a director of the Economic Affairs unit at the OECS Secretariat in St Lucia and he also worked at the Caribbean Development Bank as a director of policy.
Dr Yankey also served his country’s agriculture sector, as chairman of the Agricultural Industrial Development Bank and the Dominica Banana Marketing Corporation.
Other positions he held locally were President of the Dominica State College and board member of the Dominica Social Security.