Ulster Bank on George's Quay Plaza The Dublin region is the economic centre of Ireland, and was at the forefront of the country's economic expansion during the Celtic Tiger period. In 2009, Dublin was listed as the fourth richest city in the world by purchasing power and 10th richest by personal income. According to ''Mercer's 2011 Worldwide Cost of Living Survey'', Dublin is the 13th most expensive city in the European Union (down from 10th in 2010) and the 58th most expensive place to live in the world (down from 42nd in 2010). , approximately 874,400 people were employed in the Greater Dublin Area. Around 60% of people who are employed in Ireland's financial, ICT, and professional sectors are located in this area.