(CNBC) — The global economy is likely to be stuck in the “twilight zone” of sluggish growth in 2013, Morgan Stanley has warned, but if policymakers fail to act, it could get a lot worse.

The bank’s economics team forecasts a full-blown recession next year, under a pessimistic scenario, with global gross domestic product (GDP) likely to plunge 2 percent.

“More than ever, the economic outlook hinges upon the actions taken or not taken by governments and central banks,” Morgan Stanley said in a report.

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