Firm dynamics in an global and uncertain economy

In this dissertation, I study firm dynamics in the context of a global and uncertain economy. In the first chapter, I show how uncertainty generates reallocation among French multinationals. In a second chapter, I study how an increase in demand uncertainty negatively impacts firm growth and how the persistence of this effect depends on the synchronicity of the firm dynamic with that of the other firms in its sector. Finally in the third chapter, I highlight how the extensive margin of international trade contribute to shape the direction, quantity and content of the international transmission of knowledge.