The report found that investors are also "moving cautiously" in the region because of concerns over government transparency, foreign ownership restrictions and difficulties in enforcing commercial laws.
However, successful bids by Dubai to host the World Expo in 2020 and by Qatar to host the FIFA World Cup in 2022 have helped put a spotlight on investment opportunities in the Gulf, said the report, which was sponsored by Merck Serono, the biopharmaceutical division of Merck.
"The Arab Spring has had a negative impact on perceived stability. Even where you haven't had a major event, political risk is more on investors' minds than before," chief economist for the Middle East at Citi Group, Farouk Soussa, said.
He said in some cases capital has flocked from the wider Middle East to Gulf countries seen as stable, like the United Arab Emirates. The Arab Spring has also opened opportunities for wealthy Gulf governments to reinforce ties and influence with countries like Egypt, where billions of dollars have been invested and given in aid.
The Economist Intelligence Unit says this kind of economic model "tends to crowd out entrepreneurship" by keeping the focus on oil extraction, which is the main source of revenue.