Alexander, Carol; Jordá, Manuel Cantavella - Instituto Valenciano de Investigaciones Económicas (IVIE) - 1997
In this paper we examine the presence of seasonal unit roots in trade variables for Germany, France, the United Kingdom, and Italy, using the procedure developed by Hylleberg, Engle, Granger, and Yoo (1990) [HEGY]. Both quarterly and monthly data reject the presence of unit roots at most...
