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What are the costs to host countries of the global migrant crisis? Venetia Rainey reports from Lebanon, where poverty levels have increased since the influx of refugees from Syria. But Massimiliano Cali, senior economist at the World Bank, shows us how their data and analysis suggest migrants and refugees provide a boost to host economies.

Plus, Lucy Kellaway of the Financial Times explains why good management should be boring and predictable.

(Photo: A Syrian man sells traditional sweets on a street in the Shatila Palestinian refugee camp, Lebanon. Credit: Anwar Amro/AFP/Getty Images)