National Renewable Energy Laboratory (NREL), Mar. 2017.
http://www.nrel.gov/docs/fy17osti/67675.pdf/

"This study describes an assessment of the site-specific variation of levelized cost of energy (LCOE) and levelized avoided cost of energy (LACE) to understand the economic potential of fixed-bottom and floating offshore wind technologies in major U.S. coastal areas between 2015 and 2030."