insecurity, sluggish development in emerging economies and “rising inequality nearly everywhere”, the report said.
However, the OECD said it expected growth “to be shared more evenly across regions of the world” in the coming period.
Its outlook for the eurozone was unchanged for this year and slightly rosier for 2016, at 2.1 percent from 2.0 percent thanks to lower oil prices, the weak euro, better financial conditions and fresh stimulus spending.
But unemployment in the eurozone will remain stubborn, declining to a still painful 10.25 percent by the end of next year, the OECD said.
The report chided businesses and governments for what it called “tepid” investment.
“By and large, firms have been unwilling to spend on plant, equipment, technology and services as vigorously as they have done in previous cyclical recoveries,” it said.
“Moreover, many governments postponed infrastructure investments as part of fiscal consolidation,” it said, with negative effects on employment and wages and therefore consumption.
“On the supply side, sluggish investment has undermined the rate of growth of potential output - the capacity of economies to increase living standards, make good on future obligations to citizens, and repay debt,” the report said.
Among global risk factors it cited were new drops in oil prices; failure to reach a “satisfactory” deal between Greece and its creditors; a “hard landing” in China; and a “disorderly exit” from Washington´s zero interest rate policy.
It said it expected oil prices to “stabilise above current levels” but well below the $110 per barrel average of the three years preceding last year´s precipitous drop.
If sanctions are lifted against Iran, the OECD said the key oil producer could return to full output quickly, prompting others to “lift their supply as well in an attempt to preserve market share.”
This, in turn, would loosen the market and cause prices to rebalance at even lower levels, it said.
Greece faces a Friday deadline to repay more than 300 million euros ($328 million) to the IMF. Overall it needs to repay the global lender some 1.6 billion euros this month, funds it currently lacks.
The OECD urged a further easing of monetary policy in China “to stabilise growth and contain deflationary pressures.”
The US Federal Reserve funds rate has remained locked at zero since the end of 2008 as the Fed has sought to help pull the economy back from the Great Recession.
Fed boss Janet Ellen last week said to expect a rate hike “at some point this year” as the economy continues to mend.