If the price of a complementary good increased, then producers of this good would increase production, and the supply of good X would rise to match an anticipated increased demand. The goods might be complementary in the production process: for example, beef and leather hides. An increase in the of beef would not only increase the supply of beef but also the supply of hides. There would therefore be a direct relationship between the price of complements and the supply of good X The supply curve for good X would shift to the left if the price of a complement fell, and vice versa (see Figure 5.2)