DP9308 Task Specialization in U.S. Cities from 1880-2000

Author(s): Guy Michaels, Ferdinand Rauch, Stephen J. Redding
Publication Date: January 2013
Keyword(s): economic development, human interaction, urbanization
JEL(s): N92, O18, R12
Programme Areas: Labour Economics, Development Economics
Link to this Page: www.cepr.org/active/publications/discussion_papers/dp.php?dpno=9308

We develop a new methodology for quantifying the tasks undertaken within occupations using 3,000 verbs from around 12,000 occupational descriptions in the Dictionary of Occupational Titles (DOTs). Using micro-data from the United States from 1880-2000, we find an increase in the employment share of interactive occupations within sectors over time that is larger in metro areas than non-metro areas. We provide evidence that this increase in the interactiveness of employment is related to the dissemination of improvements in transport and communication technologies. Our findings highlight a change in the nature of agglomeration over time towards an increased emphasis on human interaction.