![FIGURE 16-3 The CPI, the PPI, and the GDP Deflator](c16_fig03.jpg)
As the figure shows, the three different measures of inflation, the PPI (orange), the CPI (green), and the GDP deflator (purple), usually move closely together. Each reveals a drastic acceleration of inflation during the 1970s and a return to relative price stability in the 1990s.
Sources: Bureau of Labor Statistics; Bureau of Economic Analysis.