La période de l’après-guerre posa d’importants défis commerciaux à l’économie canadienne. Les années entre 1945 et 1950 furent effectivement marquées par la rupture de son système commercial traditionnel et la recherche d’une stratégie alternative. Le pays dut composer avec un déficit commercial croissant à l’égard des États-Unis, ainsi qu’une chute de ses exportations à destination du Royaume-Uni, ruiné par les années de guerre. Ce déséquilibre commercial qui menaçait d’épuiser les réserves canadiennes de dollars américains reflétait l’écart entre les capacités productives des deux rives de l’Atlantique. Le programme de reconstruction des économies européennes, ou plan Marshall, fut accueilli avec enthousiasme à Ottawa puisqu’il devait non seulement rétablir les marchés du Vieux Continent, mais également faciliter la mise en place d’un réseau multilatéral d’échanges et la libéralisation du commerce international. Les tensions de la guerre froide limitèrent toutefois l’ouverture de ces marchés aux marchandises canadiennes, puisque l’endiguement du communisme commanda une consolidation européenne qui privilégia le démantèlement des entraves aux échanges intra-européens, aux dépens du commerce transatlantique. Les préoccupations de Washington en matière de sécurité collective devaient néanmoins laisser place à une stratégie alternative pour le Canada, en poussant la coopération économique des deux pays, dans le but d’optimiser une production de défense destinée aux pays membres de l’OTAN, dont la demande était soutenue par l’aide Marshall. L’incorporation du Canada dans ce dispositif de défense élargie à la communauté atlantique permit ainsi d’assurer un accès privilégié à ses marchandises sur le marché américain, et par conséquent de progresser vers l’équilibre commercial. / The postwar years brought many challenges to the Canadian economy in terms of trade policies. Indeed, in the years between 1945 and 1950, Canada experienced growing trade imbalances as imports from the United States market reached new peaks and exports to the United Kingdom decreased dramatically due to financial exhaustion caused by the war. These developments soon raised concerns as the country was faced with the prospect of foreign reserves depletion, a situation mainly caused by the productivity gap existing between the economies of the two sides of the Atlantic. The American sponsored European Recovery Program or Marshall Plan was met with enthusiasm in Ottawa as it intended to restore economic viability of the European markets as well as to establish a multilateral trade system based on non-discriminatory trade practices. The international tensions of the nascent Cold War were to limit these achievements as the need for a strong Europe dictated the elimination of restrictive trade practices between European commercial partners without giving equal treatment to transatlantic trade relations. However, the conflictual Cold War context was to offer an alternative strategy to the Canadian’s quest for dollars, for Washington’s collective security concerns paved the way to closer economic cooperation and privileged access to Canadian exports of strategic materials and other defence related commodities in the American market. The Marshall Plan was a key element of the procurement mechanism of the NATO country whose demand alleviated the pressure on Canadian foreign reserves through greater exports to the United Stated.

This thesis consists in a collection of research works dealing with various aspects of International Economics. More precisely, we focus on three main themes: (i) the existence of a world business cycle and the implications thereof, (ii) the likelihood of asymmetric shocks in the Euro Zone resulting from fluctuations in the euro exchange rate because of differences in sector specialization patterns and some consequences of such shocks, and (iii) the relationship between trade openness and growth influence of the sector specialization structure on that relationship.<p><p>Regarding the approach pursued to tackle these problems, we have chosen to strictly remain within the boundaries of empirical (macro)economics - that is, applied econometrics. Though we systematically provide theoretical models to back up our empirical approach, our only real concern is to look at the stories the data can (or cannot) tell us. As to the econometric methodology, we will restrict ourselves to the use of panel data analysis. The large spectrum of techniques available within the panel framework allows us to utilize, for each of the problems at hand, the most suitable approach (or what we think it is). / Doctorat en sciences économiques, Orientation économie / info:eu-repo/semantics/nonPublished