N

Nitsch, Volker and Wolf, Nikolaus, 1973- (2009) Tear down this wall : on the persistence of borders in trade. Working Paper. Economics Department University of Warwick: University of Warwick. (The Warwick Economics Research Paper Series (TWERPS), Vol.2009).

W

Wolf, Nikolaus, 1973-. (2009) Was Germany ever united? Evidence from intra- and international trade, 1885-1933. Journal of Economic History, Volume 69 (Number 3). pp. 846-881. ISSN 0022-0507

Wolf, Nikolaus, 1973- (2008) Was Germany ever united? Evidence from intra- and international trade 1885–1933. Working Paper. Coventry: University of Warwick, Department of Economics. (Warwick economic research papers.