The chapter has raised two critically important questions. First, is the M&A boom a one-time effect of privatization, or is it likely to be followed by a rise in Greenfield investment? Second, do these two types of FDI mode have different macroeconomic consequences in terms of aggregate investment and growth? The main purpose of this chapter is to analyze the two entry modes, mergers and acquisitions and Greenfield investment, specifically, and to present a comparative view of the same and how it leads to the economic growth of a nation. It is concluded that one should choose the right mode according to the different situation about the firms in the international market. The present chapter also concludes that Greenfields and M&As do have a positive homogenous effect on growth. Additionally, the enhancement of human capital is an important condition for the host countries to derive the maximum benefits from Greenfields and M&As. Also, there is empirical evidence of a two-way linkage between FDI and growth. However, the bidirectional relationship exists only for the M&A's growth nexus.