Final answer:
A decrease in the price of domestically produced industrial robots will affect the GDP deflator but not the consumer price index (CPI), as the CPI measures a basket of consumer goods and services, unlike the GDP deflator which encompasses all final domestic goods and services.
Step-by-step explanation:
A decrease in the price of domestically produced industrial robots will be reflected in the GDP deflator but not in the consumer price index (CPI). The CPI is a measure that examines the weighted average of prices of a basket of consumer goods and services, like transportation, food, and medical care. It is calculated by taking price changes for each item in the predetermined basket of goods and averaging them. Goods such as industrial robots do not directly fall into the typical consumer's basket but are considered in the broader scope of goods and services accounted for by the GDP deflator.
The GDP deflator is a broader measure of inflation within an economy as it includes all final goods and services produced domestically, including investment goods and government services that are not part of the consumer basket measured by the CPI. As industrial robots are part of the investment goods a country produces, a decrease in their price would directly affect the GDP deflator.