Speaking at the London School of Economics, Haldane highlighted data showing how companies that export or are foreign-owned are more productive, underscoring the importance of openness in both terms of trade or investment from abroad.
Asked how Britain's departure from the European Union might affect its productivity performance, Haldane said: "For a foreign-owned (company), it's twice as productive as domestically run firms. Higher exports, higher productivity - that screams from the data."
"So you would hope that both of those features were preserved, ideally enhanced, in a post-Brexit world," Haldane said.
(Reporting by Andy Bruce; Editing by Hugh Lawson)