A hurried renovation transpires on a conjoined pair of small buildings around the Mercato area. Many old buildings in the vast marketplace are remnants of shops built by Yemeni merchants who relocated from the old Arada area in the 1930s. The area has a thriving informal sector economy from which thousands earn daily bread. According to studies by the Centre for International Private Enterprise, nearly one-sixth of Ethiopia's urban employment is in the informal sector. Some studies have estimated the size of the informal economy in the country to be as high as a third of the GDP.