The article compares the economic expansion of the 1990s with previous ones by looking at various factors like real activity, inflation, and profits. Contrary to popular belief, the gains in the 1960s and 1980s were actually greater than in the 1990s. Inflation was stable or decreasing during the 1990s, which was new for the post-World War II period. New technologies and global disinflation played a role in this. Interest rates went down due to lower inflation and national debt. Profit margins increased significantly. However, there are concerns about overborrowing, overspending, and rising deficits. Some parts of the stock market may be overvalued, which is worrying.