Aside from his work on The Cod Fisheries, Innis wrote extensively in the 1930s about other staple products such as minerals and wheat as well as Canada's immense economic problems in the Great Depression.
Neben seiner Studie über die Kabeljaufischerei verfasste Innis in den 1930ern verschiedene Texte über Rohstoffe wie Metalle und Getreide sowie die ökonomischen Probleme Kanadas in der Großen Depression.