The names and contact detail of best colleges or institutes for studying Economics in Mumbai as your friend wants to take admission in it are as follows:

University of Mumbai
CST Rd, Kalina, Santacruz East, Mumbai, Maharashtra 400098 ‎

K J Somaiya College of Arts and Commerce,
Vidyanagar, Mumbai, Maharashtra

L.S. Raheja College of Arts and Commerce
Juhu Vile Parle, Juhu Rd, Santacruz West, Mumbai, Maharashtra 400054 ‎

Asmita College of Arts and Commerce
Janta Market, Om Vidyalankar Shikshan Sansthas, Bhakti Marg, Kannamwar Nagar II, Vikhroli East, Mumbai, Maharashtra 400083

Sophia College for Women,
Cumballa Hill, Mumbai, Maharashtra

Ramnarain Ruia College
L. Nappo Road, Matunga, Dadar East, Mumbai, Maharashtra 400019 ‎

K.C Law College
123, Dinshaw Vacha Road, Vidyasagar Prin. K. M. Kundnani Chowk, Churchgate, Mumbai,

Maharashi Dayanand College
25, Kamghar Manzil Dr Ss Rao Road Parel, Mumbai, 400012 ‎

Birla College of Arts, Science and Commerce
Birla College Road, NH 222, Kalyan, Maharashtra 421304 ‎

Ramniranjan Jhunjhunwala College
Opposite Ghatkopar Railway Station, Near Ghatkopar Station West, Dhruvraj Singh Rd, CGS Colony, Pant Nagar, Ghatkopar West, Mumbai, Maharashtra 400077 ‎