FDI played a vital role in Ireland's transition from a protectionist economy to an export-focused economy. In the 1950s and 1960s, Ireland worked to attract FDI through tax incentives and lowering trade barriers. This resulted in over 450 foreign companies establishing operations in Ireland over 10 years, including major companies like Pfizer and Gillette. Foreign investment accelerated Ireland's economic growth and led to the emergence of Ireland's "Celtic Tiger" economy in the 1990s, with GDP growth reaching 8.5% driven by investments from American tech companies like Intel. However, Ireland also experienced disadvantages like high unemployment, economic crises that hit the country hard, and overreliance on multinational corporations.