Hong Kong has again been ranked the world’s freest economy by a Canadian think tank, ahead of Singapore, although the city was once more warned that interference from Beijing in local affairs could threaten its position.The Fraser Institute of Canada, in the 2019 edition of its report “Economic Freedom of the World”, placed Hong Kong first in the ranking of free economies, followed by Singapore, New Zealand, Switzerland, the United States, Ireland, Britain, Canada, Australia and Mauritius…