Final answer:
Imposing a tariff on imported lumber is likely to result in decreased imports, and higher prices for domestic consumers, and can be beneficial to domestic producers due to reduced competition from imports.
Step-by-step explanation:
If a country that is a leading producer of lumber decides to impose a tariff on the importation of lumber, the likely result on exports, domestic consumers, and producers is that the tariff will decrease imports and raise prices for domestic consumers, while potentially benefiting domestic producers. When tariffs are imposed, domestic producers may benefit because they face less competition from imports, which can lead to increased sales and potentially more investment in production. However, this benefit to producers comes at a cost to consumers, who will likely see an increase in lumber prices due to the reduced supply of imported lumber and higher costs of domestically produced lumber.