Series Is Presented As 2 Variables: (1) Manhattan And Such Portions Of The Bronx As Were, From Time To Time, Annexed, 1868-1909 (Large Annexation In 1895; Entire Bronx Included 1898 - 1909); And (2) Manhattan Only, 1901-44. The Data Represent Estimated Cost Of Additions And Alterations For Which Plans Were Filed. No Allowance Is Made For Plans Withdrawn Or Disapproved. Not All Alterations Required Plans; Alterations Refer Only To Structural Changes. Source: 1868-80 And 1893-1901:"New York City Record"; 1881-92: Ny City, "Annual Report Of The Fire Dept.;" 1902-35: Ny City (Manhattan), "Annual Report Of The Dept. Of Buildings" (Especially 1910, P. 6); 1902-09: Ny City (Bronx), "Annual Report Of The President, " 1936-44: Records Of The Dept. Of Housing And Buildings.
This NBER data series a02058a appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02058a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Value of Plans For Additions and Alterations, Manhattan for New York, NY [A02F8AUS35620A398NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A02F8AUS35620A398NNBR, February 6, 2016.