There are six Municipal corporations in Kerala that govern Thiruvananthapuram, Kollam, Kochi, Thrissur, Kozhikode and Kannur. The Thiruvananthapuram Municipal Corporation is the largest corporation in Kerala while Kochi metropolitan area named Kochi UA is the largest urban agglomeration. According to a survey by economics research firm Indicus Analytics in 2007, Thiruvananthapuram, Kollam, Kozhikode, Thrissur, Kochi are among the "best cities in India to live"; the survey used parameters such as health, education, environment, safety, public facilities and entertainment to rank the cities.