Due to the concentration of state owned enterprises in the national capital, Beijing in 2013 had more Fortune Global 500 Company headquarters than any other city in the world. Beijing has also been described as the "billionaire capital of the world". Beijing is classified as an Alpha+ (global first-tier) city by the Globalization and World Cities Research Network, indicating its influence in the region and worldwide and making it one of the world's Top 10 major cities. In the 2021 Global Financial Centres Index, Beijing was ranked as having the sixth-most competitive financial center in the world and fourth-most competitive in the whole Asia & Oceania region (behind Shanghai, Hong Kong and Singapore). 