consider an example where both supply and demand shift.

Good Weather for Salmon Fishing

Suppose that during the summer of 2015, weather conditions were excellent for commercial salmon fishing off

the California coast. Heavy rains meant higher than normal levels of water in the rivers, which helps the

salmon to breed. Slightly cooler ocean temperatures stimulated the growth of plankton, the microscopic

organisms at the bottom of the ocean food chain, providing everything in the ocean with a hearty food supply.

The ocean stayed calm during fishing season, so commercial fishing operations did not lose many days to bad

weather. How did these climate conditions affect the quantity and price of salmon? Figure 3.16 illustrates the

four-step approach, which we explain below, to work through this problem. Table 3.6 also provides the

information to work the problem.

FIGURE 3.16 Good Weather for Salmon Fishing: The Four-Step Process Unusually good weather leads to changes
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