The article talks about how the global financial crisis led to more trade restrictions being put in place. These restrictions had a big impact on certain products but only a small overall effect on global trade. However, there's a concern that countries might start using more protectionist measures in the future, which could slow down economic recovery. The researchers suggest that keeping an eye on protectionist actions and sticking to trade agreements can help prevent this. They also propose completing the WTO Doha Round as a way to boost the economy and avoid a negative outcome.