This doctoral dissertation contributes to research on financial economics. It consists of an overall introduction and three independent papers. The first paper, “A Theory of Gazelle Growth: Competition, Venture Capital Finance, and Policy,” examines how young fast-growing small firms, called gazelles, develop. The paper investigates under which circumstances gazelles grow by establishing a new facility organically or by acquiring another firm. The paper proposes a theoretical model in which a gazelle firm competes against an incumbent firm that is a market leader in an oligopolistic market. The paper shows that a lower cost of organic growth can increase the gazelles’ incentives for acquisition growth. This is because the incumbent cannot i...