S Chandrasekhar and Ajay Sharma
Indira Gandhi Institute of Development Research, Mumbai
January 2014, WP-2014-002 full text here

This paper seeks to understand what kind of economic activities are concentrated in which regions of India. Spatial concentration of jobs is measured by calculating the location quotient using information on the industry of work of the individuals in a region. The paper uses data from NSSO 2011-12 survey of employment and unemployment.