Macau, a special administrative region of China, is a former Portuguese colony, while the other three countries mentioned are all members of the Community of Portuguese-Language Countries (CPLP).
Global gross domestic product should swell by 2.7 percent this year, marking a slight acceleration from the 2.4 percent estimated for 2015, according to an article in The Economist that cites figures from its sister organisation.
This moderate outlook for 2016 reflects the fact that growth is still incipient in the Euro Zone, in Japan and in emerging markets as a whole, the newspaper states.
The worst performing economy this year is expected to be Libya, which is set to contract by more than eight percent, followed by Venezuela, with a recession of six percent, and Equatorial Guinea, at minus three percent.
The other economies making up the top ten worst are Syria, Macau, Brazil, East Timor, Burundi, Trinidad and Tobago, and Greece, which is expected to contract by 1 percent.
Aside from war-stricken countries, those heavily dependent on the export of raw materials face a particularly bleak outlook, The Economist said.
The best performing economies this year are projected to be Turkmenistan, Laos, Cambodia and Burma - all on eight percent - with India, Bhutan, Ivory Coast, while Rwanda, Vietnam and Djibouti are all on seven percent.