Final answer:
In a command economy, the biggest role in motivating economic decisions is a desire to promote the common good.
Step-by-step explanation:
In a command economy, the factor that plays the biggest role in motivating economic decisions is a desire to promote the common good. In this type of economy, the government controls and directs all economic activities, so decisions are made based on what is believed to be best for the entire society rather than individual profits. Examples of decisions made in a command economy include the allocation of resources, setting production targets, and determining wages.
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